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Audio Precision is the recognized standard in audio test. For over thirty years, AP has offered high-performance audio analyzers, accessories and applications to help engineers worldwide design, validate, characterize and manufacture consumer, professional and industrial audio products

  

Analyzers & Accessories

  

APx58x B Series Audio Analyzers

APx58x B Series Eight- and Sixteen-Channel Modular Audio Analyzers

Channel count meets broad range of digital I/O for simultaneous, multichannel audio test.

The B Series APx585 is a true multichannel audio analyzer, with 8 simultaneous analog outputs and inputs. It is ideal for designing and testing consumer devices such as home theatre receivers or pro devices such as mixing consoles. The B Series APx586 adds a second input module for 16 simultaneous analog input channels.

The B Series APx582 offers the same 8 channels of analog input as the APx585 in combination with 2 channels of analog output. The APx582 includes the AG52 option for perfect square waves.

All three models deliver the ultimate combination of speed and ease-of-use for multichannel audio test, including:

  • Measuring one-to-many or many-to-one crosstalk and phase across channels
  • Measuring maximum power across all channels over time
  • Support for switchers to enable up to 192 maximum channel capacity

Versatility in I/O
All B Series APx58x Series analyzers have up to 216k digital inputs and outputs via AES/EBU, TOSLINK and SPDIF. Additionally, I/O may be expanded with optional Digital Serial, HDMI with ARC, PDM and Bluetooth modules. Finally, the optional Advanced Master Clock (AMC) module handles input and output clock signals to synchronize the APx58x B Series with external equipment (or vice versa), and the AMC also enables jitter generation and analysis (in conjunction with Advanced Digital, Digital Serial or PDM modules).

NOTE: B Series APx analyzers are only compatible with APx500 software version 5 and later. If your audio test requirements include the ability to run an earlier version of APx500 software, please contact your sales partner for further information.

Features

Simultaneous Multichannel Audio Analysis
A true multichannel analyzer allows not just faster testing, but also a complete picture of the performance of all of a device’s input and output channels simultaneously.Today, the majority of A/V receivers, disc players, TVs, PCs and automotive audio devices have more than two channels, from as many as eight channels (7.1) in surround sound applications to 16 or more channels in many cars. The conventional solution for testing multiple channels with a two-channel analyzer has been to use switchers.

Such an approach has two major problems. First, even when automated, switching between channels is slow. Second, because only one or two channels are being observed at a time, designers and manufacturers are often blind to interactions between channels. Problems which may go unobserved include output sag in channels during full power output tests as well as phase and crosstalk interactions, particularly the combinatorial complexity of all the output channels interacting with each other.

Transfer Function
APx500 software release 5.0 adds the ability to measure the transfer function of electronic audio and electroacoustic devices. The transfer function measurement provides the complex frequency response function for a device, including the magnitude and phase (or real and imaginary components), using any broadband signal. This feature, a powerful addition to APx software’s Sequence Mode, allows any APx analyzer to be used as a multichannel dynamic signal analyzer or as a so called dual-channel FFT analyzer. With transfer function and any broadband signal, including speech, music, or noise, APx users can now assess the complex frequency response, coherence, and impulse response of their device or system. AP’s transfer function provides gapless and overlapped analysis of multiple acquisitions. It also includes a ground-breaking signal-based triggering that eliminates the need for a pilot tone in open-loop test applications, making it ideal for test of “smart” audio devices.

Open-Loop Chirp
With release v4.6, APx500 software now enables open-loop measurements using the logarithmically-swept sine, or chirp, test signal. This signal provides multiple, high-resolution results in a brief period of time and now APx users can employ the chirp in test scenarios where the signal may originate, or terminate, as a file on the device under test (DUT) or on a server connected to the DUT. This new capability is especially helpful to those developing smart devices (e.g., smart speakers, smartphones).

Jitter Analysis
Jitter in digital audio systems may cause audible distortion in the form of jitter sidebands in the output signal. Jitter tolerance testing can reveal jitter induced distortion but is often neglected in the design of circuits and components because it is difficult and time consuming. Audio Precision APx analyzers provide jitter generation and jitter analysis features to simplify jitter testing.

Code-Free Automation and a Complete API
APx500 Measurement Software is the most advanced audio measurement interface available. Complex procedures that include user prompts, limits, and calls to external applications can be created directly in the GUI, saving time and money while ensuring painless updates over time, as no development is required.
Create custom interfaces and application-to-application automation using the comprehensive APx API. Extensive documentation and examples are provided for Visual Basic.NET, C#, MATLAB, LabVIEW, and Python. Projects and automation can be shared with other APx units anywhere in the world.

Common Software Platform
From a practical perspective, APx audio analyzers use a common software platform, making tests and results easier to share. All settings for a test are saved in a single project file, making it easy to replicate test setups between R&D and production facilities anywhere in the world. Project files are compatible with both B Series and Legacy APx instruments and each project is self-contained, so there’s never any worry about dependencies or broken links. Users can even embed waveform files and images within a project file.
For sharing measurement results with customers, contract manufacturers or management, APx automatically generates rich graphic reports, with highlighted pass / fail limits and options to export as PDF, HTML, Excel, CSV, RTF or MATLAB files.

Digital Protocol Analysis
Modern consumer devices such as televisions, Blu-ray players, and receivers typically use a digital interface such as S/PDIF, Toslink, HDMI to transmit audio signals. In addition to the digital audio data, these interfaces also carry auxiliary information about the audio signal, metadata. The APx Metadata monitors decode and display metadata values as they are received from the device under test.

Options

AG52 Analog Generator (standard, B Series APx582 only)
The AG52 analog generator option generates exceptionally clean square waves with a rise time better than 2 microseconds and has an improved THD+N of -110 dB (typical). The AG52 generates DIM 100, 30, and B square + sine waveforms and maximum output level is increased from to 26.66 Vrms (balanced).

Advanced Digital I/O (option)
Provides AES3, AES/EBU balanced digital I/O on XLR; unbalanced SPDIF digital I/O on BNC; and TOSLINK optical digital I/O. The APx ADIO module enables the generation of advanced impairments for sophisticated test of devices via AES/SPDIF/TOSLINK. It also includes the Advanced Master Clock (AMC) module, which handles input and output clock signals for synchronizing an APx with external equipment (or vice versa). AMC also provides jitter generation and measurement functionality for jitter-enabled I/O modules such as ADIO, DSIO and PDM.

Advanced Master Clock (option)
The AMC module handles input and output clock signals to synchronize the APx58x B Series with external equipment (or vice versa). This module also enables jitter generation and analysis in APx B Series analyzers with Advanced Digital (ADIO), Digital Serial (DSIO) or PDM modules installed.

ASIO (standard)
PC audio interfaces with installed ASIO drivers appear within the APx500 software as one of APx’s I/O options, with support for up to 16 bidirectional channels. All measurements and test sequences in APx may be used via the ASIO interface, allowing for complete characterization of the connected audio device.

Bluetooth Duo (option)
Audio Precision’s next-generation Bluetooth® module, the APx Bluetooth Duo™, delivers a wider selection of A2DP codecs, faster pair and connection times, an increased feature set within APx500 measurement software, and improved RF shielding for use in production test environments. APx Duo supports Bluetooth core specification v4.2, HFP v1.7, HSP v1.2, AVRCP v1.4 and A2DP v1.3.

Note: APx Bluetooth Duo requires v4.5 APx500 software (or later) and can only be installed on “Type E” APx chassis (manufactured after August 2012).

Bluetooth Legacy (option)
APx’s Bluetooth module, with built-in radio and software stack, allows engineers to measure their Bluetooth devices directly. All Bluetooth controls are integrated into the analyzer software and APx supports A2DP, HFP 1.6, and AVRCP profiles. Codec support includes SBC, aptX, CVSD, and wideband speech (mSBC).

PDM 16 (option)
PDM 16 is an optional input module providing sample-accurate inter-channel phase information for up to 16 channels of pulse density modulated signals. With its acoustically-silent remote pod and extension cable preserving PDM signal integrity for up to 10 meters, PDM 16 readily supports MEMS microphone measurements in anechoic chambers. As an added feature, the module can provide up to 50 mA Vdd power supply to the device, or devices, under test.

PDM (option)
The APx PDM option provides direct connectivity for audio devices that have a PDM (pulse density modulation) output such as a MEMS microphone, or an input such as the decimator on a smartphone chip. In addition to standard audio measurements, APx provides variable DC voltage, variable sample rate, and PSR (power supply rejection) measurements for testing devices’ full operating parameters. Jitter capable.

Digital Serial I/O (option)
Digital serial capability is essential in R&D for evaluating designs at the circuit board level. The Digital Serial I/O (DSIO) option provides a direct multichannel connection to chip-level interfaces such as I2S, TDM, and other popular serial interface formats including left-justified, right-justified, and DSP. Jitter capable.

HDMI + ARC (option)
The APx HDMI option allows engineers to measure HDMI audio quality and audio format compatibility on devices such as surround sound receivers, set-top boxes, smartphones, tablets, TVs, and DVD or Blu-ray Disc™ players. APx can stream both lossless and compressed formats from pre-encoded audio test files, making it easy to troubleshoot component compatibility and issues related to downsampling, downmixing, or transcoding.

Specification

GENERATOR PERFORMANCE

Sine Frequency Range
5 Hz to 80.1 kHz
Frequency Accuracy
3 ppm
IMD Test Signals
SMPTE, MOD, DFD
Maximum Amplitude (balanced)
14.4 Vrms (APx585 & APx586)
26.66 Vrms (APx582)
Amplitude Accuracy
±0.05 dB
Flatness (20 Hz–20 kHz)
±0.008 dB
Residual THD+N (20 kHz BW)
–103 dB + 1.4 µV
Analog Output Configurations
Unbalanced & balanced
Digital Output Sampling Rate
27 kS/s to 200 kS/s
27 kS/s to 108 kS/s Optical

Dolby / dts Generator
Yes (encoded file)

ANALYZER PERFORMANCE

Maximum Rated Input Voltage
160 Vpk
Maximum Bandwidth
1 to 16 channels of analog input 90 kHz
IMD Measurement Capability
SMPTE, MOD, DFD
Amplitude Accuracy (1 kHz)
±0.05 dB
Amplitude Flatness (20 Hz–20 kHz)
±0.008 dB
Residual Input Noise (20 kHz BW)
1.3 µV
Residual THD+N (20 kHz BW)
–103 dB + 1.4 µV
Individual Harmonic Analyzer
d2–d10
Max FFT Length
1248K points

DC Voltage Measurement
Yes

  

APx58x B Series Full Specifications

SYSTEM REQUIREMENTS
• Microsoft Windows 10 (64-bit) operating system.
• USB 2.0 or USB 3.0. Two are required for optional switcher or DCX-127 use.
• Intel i5 or better processor running at a clock speed of at least 2.5 GHz. AMD processors with similar specifications are also supported.
• At least 8 GB RAM. 16 GB is highly recommended
internet connection or CD-ROM drive (to access APx500 software for installation).
• At least 1.5 GB of free hard disk space. An SSD for the operating system drive is recommended.
• A color monitor and video card with at least SXGA (1280 X 1024) video graphics support. Video resolution of 1900 x 1080 or greater is recommended.
• More detailed information is available on our AP Software and Windows Compatibility chart

NOTES
• System performance is sensitive to processor speed; faster processors will yield faster results.
• APx500 is data intensive and it is recommended that other data-intensive applications not be run concurrently. This includes Audio Precision AP2700, APWIN or ATS.

  

APx555 B Series Audio Analyzer

APx555 B Series High-Performance, Modular Two-Channel Audio Analyzer

The New Standard - performance and versatility in audio analysis

A culmination of 30 years’ experience making test equipment recognized as the standard of the audio industry, the APx555 is a two-channel audio analyzer without compromise. Developed for R&D engineers and production technicians who need the highest possible performance, a broad range of digital I/O options and fast, intuitive software, the APx555 is the new standard for audio analyzers.

NOTE: B Series APx analyzers are only compatible with APx500 software version 5 and later. If your audio test requirements include the ability to run an earlier version of APx500 software, please contact your sales partner for further information.

Features

Unprecedented Performance
With a typical residual THD+N of -120 dB and over 1 MHz bandwidth, the APx555 surpasses the analog performance of all other audio analyzers, including a 5 dB improvement compared to our 2700 Series analyzer. Add to this FFTs of 1.2 million points and full 24-bit resolution, and you have performance unmatched by any other instrument.

Maximum Versatility in I/O
APx555 has two balanced and two unbalanced analog inputs and outputs plus 216k digital inputs and outputs via AES/EBU, TOSLINK and SPDIF. Additionally, I/O may be expanded with optional Digital Serial, HDMI with ARC, PDM and Bluetooth modules. A new Advanced Master Clock (AMC) module handles input and output clock signals to synchronize the APx555 with external equipment (or vice versa), and the AMC also enables jitter generation and analysis. AMC is standard with the APx555 and is an option for the APx52x Series and APx58x Series Audio Analyzers.

Transfer Function
APx500 software release 5.0 adds the ability to measure the transfer function of electronic audio and electroacoustic devices. The transfer function measurement provides the complex frequency response function for a device, including the magnitude and phase (or real and imaginary components), using any broadband signal. This feature, a powerful addition to APx software’s Sequence Mode, allows any APx analyzer to be used as a multichannel dynamic signal analyzer or as a so called dual-channel FFT analyzer. With transfer function and any broadband signal, including speech, music, or noise, APx users can now assess the complex frequency response, coherence, and impulse response of their device or system. AP’s transfer function provides gapless and overlapped analysis of multiple acquisitions. It also includes a ground-breaking signal-based triggering that eliminates the need for a pilot tone in open-loop test applications, making it ideal for test of “smart” audio devices.

Open-Loop Chirp
With release v4.6, APx500 software now enables open-loop measurements using the logarithmically-swept sine, or chirp, test signal. This signal provides multiple, high-resolution results in a brief period of time and now APx users can employ the chirp in test scenarios where the signal may originate, or terminate, as a file on the device under test (DUT) or on a server connected to the DUT. This new capability is especially helpful to those developing smart devices (e.g., smart speakers, smartphones).

Jitter Analysis
Jitter in digital audio systems may cause audible distortion in the form of jitter sidebands in the output signal. Jitter tolerance testing can reveal jitter induced distortion but is often neglected in the design of circuits and components because it is difficult and time consuming. Audio Precision APx analyzers provide jitter generation and jitter analysis features to simplify jitter testing.

Code-Free Automation and a Complete API
APx500 Measurement Software is the most advanced audio measurement interface available. Complex procedures that include user prompts, limits, and calls to external applications can be created directly in the GUI, saving time and money while ensuring painless updates over time, as no development is required.
Create custom interfaces and application-to-application automation using the comprehensive APx API. Extensive documentation and examples are provided for Visual Basic.NET, C#, MATLAB, LabVIEW, and Python. Projects and automation can be shared with other APx units anywhere in the world.

Common Software Platform
From a practical perspective, APx audio analyzers use a common software platform, making tests and results easier to share. All settings for a test are saved in a single project file, making it easy to replicate test setups between R&D and production facilities anywhere in the world. Project files are compatible with both B Series and Legacy APx instruments and each project is self-contained, so there’s never any worry about dependencies or broken links. Users can even embed waveform files and images within a project file.
For sharing measurement results with customers, contract manufacturers or management, APx automatically generates rich graphic reports, with highlighted pass / fail limits and options to export as PDF, HTML, Excel, CSV, RTF or MATLAB files.

Made to Measure for Power Amp Designers
Measure continuous maximum output and peak maximum output automatically, DIM measurements, view power spectrum graphs with a regulated frequency sweep and take other measurements as specified by the CEA-2006 and CEA-490A standards. In addition to conventional balanced common mode rejection measurements, APx555 also enables CMRR measurements in accordance with IEC60268 section 14.15.1.

Digital Protocol Analysis
Modern consumer devices such as televisions, Blu-ray players, and receivers typically use a digital interface such as S/PDIF, Toslink, HDMI to transmit audio signals. In addition to the digital audio data, these interfaces also carry auxiliary information about the audio signal, metadata. The APx Metadata monitors decode and display metadata values as they are received from the device under test.

Options

Advanced Digital I/O (standard)
Provides AES3, AES/EBU balanced digital I/O on XLR; unbalanced SPDIF digital I/O on BNC; and TOSLINK optical digital I/O. The APx ADIO module enables the generation of advanced impairments for sophisticated test of devices via AES/SPDIF/TOSLINK. It also includes the Advanced Master Clock (AMC) module, which handles input and output clock signals for synchronizing an APx with external equipment (or vice versa). AMC also provides jitter generation and measurement functionality for jitter-enabled I/O modules such as ADIO, DSIO and PDM.

ASIO (standard)
PC audio interfaces with installed ASIO drivers appear within the APx500 software as one of APx’s I/O options, with support for up to 16 bidirectional channels. All measurements and test sequences in APx may be used via the ASIO interface, allowing for complete characterization of the connected audio device.

Bluetooth Duo (option)
Audio Precision’s next-generation Bluetooth® module, the APx Bluetooth Duo™, delivers a wider selection of A2DP codecs, faster pair and connection times, an increased feature set within APx500 measurement software, and improved RF shielding for use in production test environments. APx Duo supports Bluetooth core specification v4.2, HFP v1.7, HSP v1.2, AVRCP v1.4 and A2DP v1.3. Note: APx Bluetooth Duo requires v4.5 APx500 software (or later) and can only be installed on “Type E” APx chassis (manufactured after August 2012).

Bluetooth Legacy (option)
APx’s Bluetooth module, with built-in radio and software stack, allows engineers to measure their Bluetooth devices directly. All Bluetooth controls are integrated into the analyzer software and APx supports A2DP, HFP 1.6, and AVRCP profiles. Codec support includes SBC, aptX, CVSD, and wideband speech (mSBC).

PDM 16 (option)
PDM 16 is an optional input module providing sample-accurate inter-channel phase information for up to 16 channels of pulse density modulated signals. With its acoustically-silent remote pod and extension cable preserving PDM signal integrity for up to 10 meters, PDM 16 readily supports MEMS microphone measurements in anechoic chambers. As an added feature, the module can provide up to 50 mA Vdd power supply to the device, or devices, under test.

PDM (option)
The APx PDM option provides direct connectivity for audio devices that have a PDM (pulse density modulation) output such as a MEMS microphone, or an input such as the decimator on a smartphone chip. In addition to standard audio measurements, APx provides variable DC voltage, variable sample rate, and PSR (power supply rejection) measurements for testing devices’ full operating parameters. Jitter capable.

Digital Serial I/O (option)
Digital serial capability is essential in R&D for evaluating designs at the circuit board level. The Digital Serial I/O (DSIO) option provides a direct multichannel connection to chip-level interfaces such as I2S, TDM, and other popular serial interface formats including left-justified, right-justified, and DSP. Jitter capable.

HDMI + ARC (option)
The APx HDMI option allows engineers to measure HDMI audio quality and audio format compatibility on devices such as surround sound receivers, set-top boxes, smartphones, tablets, TVs, and DVD or Blu-ray Disc™ players. APx can stream both lossless and compressed formats from pre-encoded audio test files, making it easy to troubleshoot component compatibility and issues related to downsampling, downmixing, or transcoding.

Specification

GENERATOR PERFORMANCE
Sine Frequency Range
0.001 Hz to 80 kHz, DAC
5 Hz to 204 kHz, Analog
Frequency Accuracy
3 ppm, DAC
30 ppm, Analog (Precision Tune)
IMD Test Signals
SMPTE, MOD, DFD, DIM
Maximum Amplitude (balanced)
26.66 Vrms
Amplitude Accuracy
±0.03 dB
Flatness (5 Hz–20 kHz)
±0.008 dB
Residual THD+N (22 kHz BW)
–117 dB + 1.0 µV
Typically <–120 dB (1 kHz, 2.0 V)
Analog Output Configurations
unbalanced, balanced (differential & single-ended), CMTST
Digital Output Sampling Rate
27 kS/s to 200 kS/s
27 kS/s to 108 kS/s Optical
ADC Test VBias Range
–0.4 to +4.2 VDC

ANALYZER PERFORMANCE
Maximum Rated Input Voltage
230 Vpk
Maximum Bandwidth
>1 MHz
IMD Measurement Capability
SMPTE, MOD, DFD, DIM
Amplitude Accuracy (1 kHz)
±0.03 dB
Amplitude Flatness (10 Hz–20 kHz)
±0.008 dB
Residual Input Noise (22 kHz BW)
=1.0 µV
Residual THD+N (22 kHz BW)
–117 dB + 1.0 µV
Typically <–120 dB (1 kHz, 2.0 V)
Individual Harmonic Analyzer   
H2–H10
Max FFT Length
1248K points
DC Voltage Measurement
Yes

APx555 B Series Full Specifications

SYSTEM REQUIREMENTS
• Microsoft Windows 10 (64-bit) operating system.
• USB 2.0 or USB 3.0. Two are required for optional switcher or DCX-127 use.
• Intel i5 or better processor running at a clock speed of at least 2.5 GHz. AMD processors with similar specifications are also supported.
• At least 8 GB RAM. 16 GB is highly recommended
internet connection or CD-ROM drive (to access APx500 software for installation).
• At least 1.5 GB of free hard disk space. An SSD for the operating system drive is recommended.
• A color monitor and video card with at least SXGA (1280 X 1024) video graphics support. Video resolution of 1900 x 1080 or greater is recommended.
• More detailed information is available on our AP Software and Windows Compatibility chart

NOTES
• System performance is sensitive to processor speed; faster processors will yield faster results.
• APx500 is data intensive and it is recommended that other data-intensive applications not be run concurrently. This includes Audio Precision AP2700, APWIN or ATS.

  

APx52x B Series Audio Analyzers

APx52x B Series Modular, Two- and Four-Channel Performance Audio Analyzers

The ideal balance of analog performance and breadth of digital I/O.

The B Series APx525 is a two-channel audio analyzer for R&D engineers and production technicians who want fast and easy audio testing, but who may not need the ultra-high performance of AP’s APx555 nor require the multichannel capability of the APx585.

Versatility in I/O
APx525 has two balanced and two unbalanced analog inputs and outputs plus 216k digital inputs and outputs via AES/EBU, TOSLINK and SPDIF. APx526 is the four-channel version of the APx525, developed for the four channel head units typical of the automotive audio industry.
Additionally, I/O may be expanded with optional Digital Serial (APx525 and APx526), HDMI + ARC (APx525), PDM (APx525 and APx526) and Bluetooth (APx525 and APx526) modules. Additionally, the optional Advanced Master Clock (AMC) module handles input and output clock signals to synchronize the APx52x Series with external equipment (or vice versa), and the AMC also enables jitter generation and analysis (in conjunction with Advanced Digital, Digital Serial or PDM modules).

NOTE: B Series APx analyzers are only compatible with APx500 software version 5 and later. If your audio test requirements include the ability to run an earlier version of APx500 software, please contact your sales partner for further information.

Features

Transfer Function
APx500 software release 5.0 adds the ability to measure the transfer function of electronic audio and electroacoustic devices. The transfer function measurement provides the complex frequency response function for a device, including the magnitude and phase (or real and imaginary components), using any broadband signal. This feature, a powerful addition to APx software’s Sequence Mode, allows any APx analyzer to be used as a multichannel dynamic signal analyzer or as a so called dual-channel FFT analyzer. With transfer function and any broadband signal, including speech, music, or noise, APx users can now assess the complex frequency response, coherence, and impulse response of their device or system. AP’s transfer function provides gapless and overlapped analysis of multiple acquisitions. It also includes a ground-breaking signal-based triggering that eliminates the need for a pilot tone in open-loop test applications, making it ideal for test of “smart” audio devices.

Open-Loop Chirp
With release v4.6, APx500 software now enables open-loop measurements using the logarithmically-swept sine, or chirp, test signal. This signal provides multiple, high-resolution results in a brief period of time and now APx users can employ the chirp in test scenarios where the signal may originate, or terminate, as a file on the device under test (DUT) or on a server connected to the DUT. This new capability is especially helpful to those developing smart devices (e.g., smart speakers, smartphones).

Jitter Analysis
Jitter in digital audio systems may cause audible distortion in the form of jitter sidebands in the output signal. Jitter tolerance testing can reveal jitter induced distortion but is often neglected in the design of circuits and components because it is difficult and time consuming. Audio Precision APx analyzers provide jitter generation and jitter analysis features to simplify jitter testing.

Code-Free Automation and a Complete API
APx500 Measurement Software is the most advanced audio measurement interface available. Complex procedures that include user prompts, limits, and calls to external applications can be created directly in the GUI, saving time and money while ensuring painless updates over time, as no development is required.
Create custom interfaces and application-to-application automation using the comprehensive APx API. Extensive documentation and examples are provided for Visual Basic.NET, C#, MATLAB, LabVIEW, and Python. Projects and automation can be shared with other APx units anywhere in the world.

Common Software Platform
From a practical perspective, APx audio analyzers use a common software platform, making tests and results easier to share. All settings for a test are saved in a single project file, making it easy to replicate test setups between R&D and production facilities anywhere in the world. Project files are compatible with both B Series and Legacy APx instruments and each project is self-contained, so there’s never any worry about dependencies or broken links. Users can even embed waveform files and images within a project file.
For sharing measurement results with customers, contract manufacturers or management, APx automatically generates rich graphic reports, with highlighted pass / fail limits and options to export as PDF, HTML, Excel, CSV, RTF or MATLAB files.

Digital Protocol Analysis
Modern consumer devices such as televisions, Blu-ray players, and receivers typically use a digital interface such as S/PDIF, Toslink, HDMI to transmit audio signals. In addition to the digital audio data, these interfaces also carry auxiliary information about the audio signal, metadata. The APx Metadata monitors decode and display metadata values as they are received from the device under test.

Options

High-Performance Options – AG52 and BW52
Developed for power amp designers, the AG52 analog generator option generates exceptionally clean square waves with a rise time better than 2 microseconds and has an improved THD+N of -110 dB (typical). The AG52 generates DIM 100, 30, and B square + sine waveforms and maximum output level is increased from 21.21Vrms to 26.66 Vrms (balanced).
The BW52 ultra-high bandwidth option offers advanced FFT performance: 1.248 million points, DC to 1 MHz bandwidth and full 24-bit resolution. Ideal for Class D amplifier design.

Advanced Digital I/O (option)
Provides AES3, AES/EBU balanced digital I/O on XLR; unbalanced SPDIF digital I/O on BNC; and TOSLINK optical digital I/O. The APx ADIO module enables the generation of advanced impairments for sophisticated test of devices via AES/SPDIF/TOSLINK. It also includes the Advanced Master Clock (AMC) module, which handles input and output clock signals for synchronizing an APx with external equipment (or vice versa). AMC also provides jitter generation and measurement functionality for jitter-enabled I/O modules such as ADIO, DSIO and PDM.

Advanced Master Clock (option)
The AMC module handles input and output clock signals to synchronize the APx52x B Series with external equipment (or vice versa). This module also enables jitter generation and analysis in APx500 Series analyzers with Advanced Digital (ADIO), Digital Serial (DSIO) or PDM modules installed.

ASIO (standard)
PC audio interfaces with installed ASIO drivers appear within the APx500 software as one of APx’s I/O options, with support for up to 16 bidirectional channels. All measurements and test sequences in APx may be used via the ASIO interface, allowing for complete characterization of the connected audio device.

Bluetooth Duo (option)
Audio Precision’s next-generation Bluetooth® module, the APx Bluetooth Duo™, delivers a wider selection of A2DP codecs, faster pair and connection times, an increased feature set within APx500 measurement software, and improved RF shielding for use in production test environments. APx Duo supports Bluetooth core specification v4.2, HFP v1.7, HSP v1.2, AVRCP v1.4 and A2DP v1.3. Note: APx Bluetooth Duo requires v4.5 APx500 software (or later) and can only be installed on “Type E” APx chassis (manufactured after August 2012).

Bluetooth Legacy (option)
APx’s Bluetooth module, with built-in radio and software stack, allows engineers to measure their Bluetooth devices directly. All Bluetooth controls are integrated into the analyzer software and APx supports A2DP, HFP 1.6, and AVRCP profiles. Codec support includes SBC, aptX, CVSD, and wideband speech (mSBC).

PDM 16 (option)
PDM 16 is an optional input module providing sample-accurate inter-channel phase information for up to 16 channels of pulse density modulated signals. With its acoustically-silent remote pod and extension cable preserving PDM signal integrity for up to 10 meters, PDM 16 readily supports MEMS microphone measurements in anechoic chambers. As an added feature, the module can provide up to 50 mA Vdd power supply to the device, or devices, under test.

PDM (option)
The APx PDM option provides direct connectivity for audio devices that have a PDM (pulse density modulation) output such as a MEMS microphone, or an input such as the decimator on a smartphone chip. In addition to standard audio measurements, APx provides variable DC voltage, variable sample rate, and PSR (power supply rejection) measurements for testing devices’ full operating parameters. Jitter capable.

Digital Serial I/O (option)
Digital serial capability is essential in R&D for evaluating designs at the circuit board level. The Digital Serial I/O (DSIO) option provides a direct multichannel connection to chip-level interfaces such as I2S, TDM, and other popular serial interface formats including left-justified, right-justified, and DSP. Jitter capable.

HDMI + ARC (option)
The APx HDMI option allows engineers to measure HDMI audio quality and audio format compatibility on devices such as surround sound receivers, set-top boxes, smartphones, tablets, TVs, and DVD or Blu-ray Disc™ players. APx can stream both lossless and compressed formats from pre-encoded audio test files, making it easy to troubleshoot component compatibility and issues related to downsampling, downmixing, or transcoding.

Specification

GENERATOR PERFORMANCE
Sine Frequency Range
0.1 Hz to 80.1 kHz
Frequency Accuracy
2 ppm
IMD Test Signals
SMPTE, MOD, DFD
Maximum Amplitude (balanced)
21.21 Vrms
Amplitude Accuracy
±0.03 dB
Flatness (20 Hz–20 kHz)
±0.008 dB
Residual THD+N (20 kHz BW)
–105 dB + 1.4 µV
Typically <–108 dB (1 kHz, 2.5 V)
Typically <–110 dB (1 kHz, 2.5 V – option AG52 installed)
Analog Output Configurations
Unbalanced & balanced
Digital Output Sampling Rate
27 kS/s to 200 kS/s
27 kS/s to 108 kS/s Optical
Dolby / dts Generator
Yes (encoded file)
ANALYZER PERFORMANCE
Maximum Rated Input Voltage
230 Vpk
Maximum Bandwidth
>90 kHz
>1 MHz [with BW52]
IMD Measurement Capability
SMPTE, MOD, DFD
Amplitude Accuracy (1 kHz)
±0.03 dB
Amplitude Flatness (20 Hz–20 kHz)
±0.008 dB
Residual Input Noise (20 kHz BW)
1.3 µV
Residual THD+N (20 kHz BW)
–105 dB + 1.4 µV
Typically <–108 dB (1 kHz, 2.5 V)
Typically <–110 dB (1 kHz, 2.5 V – option AG52 installed)
Individual Harmonic Analyzer
d2–d10
Max FFT Length
1248K points

DC Voltage Measurement
Yes


APx52x B Series Full Specifications

SYSTEM REQUIREMENTS
• Microsoft Windows 10 (64-bit) operating system.
• USB 2.0 or USB 3.0. Two are required for optional switcher or DCX-127 use.
• Intel i5 or better processor running at a clock speed of at least 2.5 GHz. AMD processors with similar specifications are also supported.
• At least 8 GB RAM. 16 GB is highly recommended
internet connection or CD-ROM drive (to access APx500 software for installation).
• At least 1.5 GB of free hard disk space. An SSD for the operating system drive is recommended.
• A color monitor and video card with at least SXGA (1280 X 1024) video graphics support. Video resolution of 1900 x 1080 or greater is recommended.
• More detailed information is available on our AP Software and Windows Compatibility chart

NOTES
• System performance is sensitive to processor speed; faster processors will yield faster results.
• APx500 is data intensive and it is recommended that other data-intensive applications not be run concurrently. This includes Audio Precision AP2700, APWIN or ATS.

  

APx515 B Series Audio Analyzer

APx515 B Series Two-Channel Audio Analyzer

Ideal for production test and entry-level R&D applications

The B Series APx515 is a performance audio analyzer optimized for production test. It is a best-in-class instrument, offering a powerful combination of speed, performance, automation, reliability and ease-of-use.

The B Series APx515 can make all key audio measurements in less than three seconds. Despite its low cost, APx515 still has excellent performance, with a typical THD+N of –106 dB, 1.2M point FFTs and up to 216k digital I/O, as well as the one-click automation and ease-of-use of all APx B Series audio analyzers. Like all AP instruments, APx515 comes with an ISO:17025 Accredited Calibration and three-year warranty, so its results are trusted everywhere.

The B Series APx515 operates either as a stand-alone test unit with its own user interface, or it can be controlled by a master .NET or LabVIEW application. In either case, an operator can control the APx515 with a keyboard, foot switch or barcode scanner, or the system can be totally automated. Switchers and external devices such as pass/fail lights are also supported.

NOTE: B Series APx analyzers are only compatible with APx500 software version 5 and later. If your audio test requirements include the ability to run an earlier version of APx500 software, please contact your sales partner for further information.

Features

Transfer Function
APx500 software release 5.0 adds the ability to measure the transfer function of electronic audio and electroacoustic devices. The transfer function measurement provides the complex frequency response function for a device, including the magnitude and phase (or real and imaginary components), using any broadband signal. This feature, a powerful addition to APx software’s Sequence Mode, allows any APx analyzer to be used as a multichannel dynamic signal analyzer or as a so called dual-channel FFT analyzer. With transfer function and any broadband signal, including speech, music, or noise, APx users can now assess the complex frequency response, coherence, and impulse response of their device or system. AP’s transfer function provides gapless and overlapped analysis of multiple acquisitions. It also includes a ground-breaking signal-based triggering that eliminates the need for a pilot tone in open-loop test applications, making it ideal for test of “smart” audio devices.

Open-Loop Chirp
With release v4.6, APx500 software now enables open-loop measurements using the logarithmically-swept sine, or chirp, test signal. This signal provides multiple, high-resolution results in a brief period of time and now APx users can employ the chirp in test scenarios where the signal may originate, or terminate, as a file on the device under test (DUT) or on a server connected to the DUT. This new capability is especially helpful to those developing smart devices (e.g., smart speakers, smartphones). Use of the open-loop chirp capability with B Series APx515 analyzers requires at least one software option or bundle that contain a supported chirp measurement (e.g., APX-SW-ACR, APX-SPK-RD).

Code-Free Automation and a Complete API
APx500 Measurement Software is the most advanced audio measurement interface available. Complex procedures that include user prompts, limits, and calls to external applications can be created directly in the GUI, saving time and money while ensuring painless updates over time, as no development is required.
Create custom interfaces and application-to-application automation using the comprehensive APx API. Extensive documentation and examples are provided for Visual Basic.NET, C#, MATLAB, LabVIEW, and Python. Projects and automation can be shared with other APx units anywhere in the world.

Common Software Platform
From a practical perspective, APx audio analyzers use a common software platform, making tests and results easier to share. All settings for a test are saved in a single project file, making it easy to replicate test setups between R&D and production facilities anywhere in the world. Project files are compatible with both B Series and Legacy APx instruments and each project is self-contained, so there’s never any worry about dependencies or broken links. Users can even embed waveform files and images within a project file.
For sharing measurement results with customers, contract manufacturers or management, APx automatically generates rich graphic reports, with highlighted pass / fail limits and options to export as PDF, HTML, Excel, CSV, RTF or MATLAB files.

Digital Protocol Analysis
Modern consumer devices such as televisions, Blu-ray players, and receivers typically use a digital interface such as S/PDIF, Toslink, HDMI to transmit audio signals. In addition to the digital audio data, these interfaces also carry auxiliary information about the audio signal, metadata. The APx Metadata monitors decode and display metadata values as they are received from the device under test.

B Series APx515 Standard Measurements (Advanced measurements available for the APx515 are listed in the Options tab or the APx515 B Series data sheet.)
• Crosstalk
• DC Level
• DC Level Sweep
• DUT Delay
• Frequency Measurement
• Frequency Response
• Interchannel Phase
• Level & Gain
• Level Ratio
• Measurement Recorder
• Noise
• Pass / Fail
• Q-peak Noise
• SINAD
• Signal Acquisition
• Signal-to-Noise Ratio
• Stepped Frequency Sweep
• Stepped Level Sweep
• TEDS Data
• THD+N
• Transfer Function

Options

AES/SPDIF (B Series APx515 standard)
Provides AES3, AES/EBU balanced digital I/O on XLR; unbalanced SPDIF digital I/O on BNC; and TOSLINK optical digital I/O.

ASIO (B Series APx515 option)
Direct connection to ASIO-enabled devices. Supports up to 16 channels of ASIO at one time (with v4.0 software or later; two channels only when using earlier APx software versions). Requires either APX-SW-ASIO or one of the optional B Series APx515 software bundles (APX-SWB-2 or APX-SWB-6).

Specification

SYSTEM PERFORMANCE
Residual THD+N (20 kHz BW)
–102 dB + 1.4 µV
Typical <–106 dB (1 kHz, 2.0 V)

GENERATOR PERFORMANCE
Sine Frequency Range
2 Hz to 80.1 kHz
Frequency Accuracy
3 ppm
IMD Test Signals
SMPTE, MOD, DFD
Maximum Amplitude (balanced)
16.00 Vrms
Amplitude Accuracy
±0.05 dB
Flatness (5 Hz–20 kHz)
±0.010 dB
Analog Output Configurations
unbalanced, balanced, common mode
Digital Output Sampling Rate
27 kS/s to 200 kS/s
27 kS/s to 108 kS/s Optical
Dolby / dts Generator
Yes (encoded file)

ANALYZER PERFORMANCE
Maximum Rated Input Voltage
125 Vpk
Maximum Bandwidth
>90 kHz
IMD Measurement Capability
SMPTE, MOD, DFD
Amplitude Accuracy (1 kHz)
±0.05 dB
Amplitude Flatness (10 Hz–20 kHz)
±0.010 dB
Residual Input Noise (20 kHz BW)
≤1.4 µV
Individual Harmonic Analyzer
d2–d10
Max FFT Length
1248K points

DC Voltage Measurement
Yes

  

  

  

APx515 B Series Full Specifications

SYSTEM REQUIREMENTS
• Microsoft Windows 10 (64-bit) operating system.
• USB 2.0 or USB 3.0. Two are required for optional switcher or DCX-127 use.
• Intel i5 or better processor running at a clock speed of at least 2.5 GHz. AMD processors with similar specifications are also supported.
• At least 8 GB RAM. 16 GB is highly recommended
internet connection or CD-ROM drive (to access APx500 software for installation).
• At least 1.5 GB of free hard disk space. An SSD for the operating system drive is recommended.
• A color monitor and video card with at least SXGA (1280 X 1024) video graphics support. Video resolution of 1900 x 1080 or greater is recommended.
• More detailed information is available on our AP Software and Windows Compatibility chart

NOTES
• System performance is sensitive to processor speed; faster processors will yield faster results.
• APx500 is data intensive and it is recommended that other data-intensive applications not be run concurrently. This includes Audio Precision AP2700, APWIN or ATS.

  

APx555

Unprecedented Performance
With a typical residual THD+N of -120 dB and over 1 MHz bandwidth, the APx555 surpasses the analog performance of all other audio analyzers, including a 5 dB improvement compared to our 2700 Series analyzer. Add to this FFTs of 1.2 million points and full 24-bit resolution, and you have performance unmatched by any other instrument.

Maximum Versatility in I/O
APx555 has two balanced and two unbalanced analog inputs and outputs plus 216k digital inputs and outputs via AES/EBU, TOSLINK and SPDIF. Additionally, I/O may be expanded with optional Digital Serial, HDMI with ARC, PDM and Bluetooth modules. A new Advanced Master Clock (AMC) module handles input and output clock signals to

  

APx52x

Versatility in I/O
APx525 has two balanced and two unbalanced analog inputs and outputs plus 216k digital inputs and outputs via AES/EBU, TOSLINK and SPDIF. APx526 is the four channel version of the APx525, developed for the 4 channel head units typical of the automotive audio industry.

Additionally, I/O may be expanded with optional Digital Serial (APx525 and APx526), HDMI + ARC (APx525), PDM (APx525 and APx526) and Bluetooth (APx525 and APx526) modules. Additionally, the optional Advanced Master Clock (AMC) module handles input and output clock signals to synchronize the APx52x Series with external equipment (or vice versa), and the AMC also enables jitter generation and analysis (in conjunction with Advanced Digital, Digital Serial or PDM modules).

  

APx58x

Versatility in I/O
All APx58x Series analyzers have up to 216k digital inputs and outputs via AES/EBU, TOSLINK and SPDIF. Additionally, I/O may be expanded with optional Digital Serial, HDMI with ARC, PDM and Bluetooth modules. Finally, the optional Advanced Master Clock (AMC) module handles input and output clock signals to synchronize the APx58x Series with external equipment (or vice versa), and the AMC also enables jitter generation and analysis (in conjunction with Advanced Digital, Digital Serial or PDM modules).

  

APx515

The APx515 is a high-performance audio analyzer optimized for production test. It is a best-in-class instrument, offering a powerful combination of speed, performance, automation, reliability and ease-of-use.

APx515 can make all of the key audio measurements in less than three seconds. Despite its low cost, APx515 still has excellent performance, with a typical THD+N of –106 dB, 1.2M point FFTs and up to 216k digital I/O, as well as the one-click automation and ease-of-use of all APx Series audio analyzers. Like all AP instruments, APx515 comes with an ISO:17025 Accredited Calibration and three year warranty, so its results are trusted everywhere.  

APx515 operates either as a stand-alone test unit with its own user interface, or it can be controlled by a master .NET or LabVIEW application. In either case, an operator can control the APx515 with a keyboard, foot switch or barcode scanner, or the system can be totally automated. Switchers and external devices such as pass/fail lights are also supported.

  

APx511

The APx511 audio analyzer is designed specifically for the needs of hearing instrument manufacturers, providing the specific measurements and I/O required for hearing instrument production test, delivered with Audio Precision’s reputation for high performance and reliability.

APx511 supports a .NET library of functions that automate the tests described in IEC60118- 7 and ANSI S3.22. For the production environment, these functions can be called from any .NET capable language or LabVIEW to control the APx511’s output and measurement settings.


Contact us:

Address:

252/97(B), 19F, Tower B
Muang Thai-Phatra Complex Building
Ratchadaphisek Road
Huaykwang, Bangkok
Thailand
  

Tel:

66 (0) 2693 3445

Fax:

66 (0) 2693 3448

Postal Code: 10310

  

  

Email:

  

  

chanwit.p@th.ese-asia.com

piriyapat.s@th.ese-asia.com

prapon.s@th.ese-asia.com