Software


FREQUENT DOWNLOADS





AP2700 Control Software 3.3 SP2 (9.89 MB)

Compatible with 2700 Series, System Two Cascade, and System Two Cascade Plus.

Version 3.3 SP2 (and SP1) supports 64-bit Windows 7 using the APIB-USB adapter. The OPT-2711 (Dolby Digital generator option) is not supported. Instruments with OPT-2711 installed will function correctly on a 64-bit PC, but the Dolby Digital generator will not be available.

For Windows 8, please also download the AP2700 Windows 8 USB Drivers and follow the included instructions.

More detailed information is available on our AP Software and Windows Compatibility chart




AP2700 DspRiff4.ocx Update 3.3x (344.00 KB)
  1. AP2700 v3.30 has an issue with the Import .wav File function, causing file truncation and frequency error correction problems. This can be corrected by replacing the DspRiff4.ocx file in the C:Program FilesCommon FilesAudio Precision folder with this version.
    This issue has been corrected in AP2700 v3.30 SP1. We recommend that you download and install SP1 or later instead of just replacing this file, as it addresses some other issues as well as adds a driver for 64-bit versions of Windows.



APWIN Control Software 2.24 (24.09 MB)

APWIN Control software. For all System One and System Two models.




APx Hearing Instrument Analyzer Software 4.3 (5.6 MB)

Automated test software for the APx511 Hearing Instrument Audio Analyzer. The APx500 Measurement Software of the same version must already be installed before installing this software.




APx500 Measurement Software 4.2.1 (124.7 MB)

APx500 measurement software for all APx Series instruments.

This download is suitable for most users. If Microsoft .NET version 4.5 is not already on your PC, it will be downloaded during the installation.

For PCs that do not have .NET version 4.5 installed, and are not connected to the Internet, download the full installer instead (APx500 Measurement Software (with .NET)) NOTE: .NET 4.5 does not support Microsoft Windows XP.

Additional information:

APx500 What's New
AP Software and Windows Compatibility chart




APx500 Measurement Software 4.3 (134.6 MB)

APx500 measurement software for all APx Series instruments.

This download is suitable for most users. If Microsoft .NET version 4.5 is not already on your PC, it will be downloaded during the installation.

For PCs that do not have .NET version 4.5 installed, and are not connected to the Internet, download the full installer instead (APx500 Measurement Software (with .NET)) NOTE: .NET 4.5 does not support Microsoft Windows XP.

Additional information:

APx500 What's New
AP Software and Windows Compatibility chart




APx500 Measurement Software (with .NET) 4.2.1 (190.57 MB)

APx500 Measurement Software for all APx Series instruments.

This download includes the Microsoft .NET Framework version 4.5, and is suitable for installation on PCs that are not connected to the Internet and do not already have version 4.5 installed. NOTE: .NET 4.5 does not support Microsoft Windows XP.

For installation on Internet connected PCs, download APx500 Measurement Software instead.

Additional information:

APx500 What's New
AP Software and Windows Compatibility




2700 Series LabVIEW Driver 1.0.1 (2.12 MB)

Audio Precision has developed a complete LabVIEW project-style instrument driver for IEEE 488.2 (GPIB) equipped models of the 2700 Series of audio analyzers. This driver supports NI LabVIEW 8.20.




AP2700 C# Using References 1.0 (149.90 KB)

Example utilizing C# for AP2700 "using references" (Visual C# 2005).




AP2700 LabVIEW Examples 3.3 (0.00 KB)

LabVIEW VI examples for controlling 2700 Series and System Two Cascade  instruments using AP2700 control software and ActiveX automation. For usage instructions, see Technote 101




APWin LabVIEW Examples 2.24 (172.10 KB)

LabVIEW VI examples for controlling System Two and System One instruments using APWin control software and ActiveX automation. For usage instructions, see

Technote 101

For controlling type "A" instruments, or type "G" instruments via the APIB bus. Requires LabVIEW 6.0 or higher.




APx API 2.5 2.5 (37.04 MB)



APx API Developer Tools 4.2 (72.75 MB)

Resources for API developers. Includes VB.NET and C# templates and example code, C++ examples, LabVIEW examples, and the APx Wavereader dll. Documentation includes Intro to Programming the APx500 API and the APx API Browser. The APx LabVIEW driver is a separate download.

Included in this download:

What's New in the APx500 API
Introduction to Programming the APx500 API
API Browser application




APx API Developer Tools 4.3 (29.7 MB)

Resources for API developers. Includes VB.NET and C# templates and example code, C++ examples, LabVIEW examples, and the APx Wavereader dll. Documentation includes Intro to Programming the APx500 API and the APx API Browser. The APx LabVIEW driver is a separate download.

Included in this download:

What's New in the APx500 API
Introduction to Programming the APx500 API
API Browser application




APx API Wrapper (for VEE, MATLAB) 2.4 (185.00 KB)

This APx API wrapper dll enables you to access the entire APx API when using Agilent VEE and The Mathworks MATLAB. A discussion and instructions are in the kb article "Using APx with VEE." This download is only necessary for APx500 v2.4. APx500 v2.5 and later already include it.




APx Introduction to Programming the APx500 API 4.2 (1.25 MB)

A guide to using the APx500 API, updated for the current version.




APx LabVIEW .NET Driver 4.2.3 (30.11 MB)

The APx LabVIEW Driver is a collection of Virtual Instruments (VIs) that provide LabVIEW users with most of the functionality available in the APx500 Application Programming Interface (API) using high level, LabVIEW-typical subVIs. With the driver, you can quickly and efficiently develop APx applications with clean, concise LabVIEW code. Please note that the LabVIEW Driver is specific for each release of APx500. Requires LabVIEW 2010 or higher.




APx LabVIEW .NET Driver 4.3 (30.42 MB)

The APx LabVIEW Driver is a collection of Virtual Instruments (VIs) that provide LabVIEW users with most of the functionality available in the APx500 Application Programming Interface (API) using high level, LabVIEW-typical subVIs. With the driver, you can quickly and efficiently develop APx applications with clean, concise LabVIEW code. Please note that the LabVIEW Driver is specific for each release of APx500. Requires LabVIEW 2010 or higher.




APx LabVIEW DAQ Driver (for APx515 only) 1.0 (20.85 MB)

The LabVIEW DAQ Driver for APx515 communicates directly with APx515 hardware and does not utilize the APx500 measurement software or API. Its functionality is similar to NI DAQmx, making it possible to upgrade an existing test system that uses DAQmx to utilize the APx515 with reduced effort. Requires LabVIEW 2012 or later, and VIPM 2014 or later for installation.

If you are looking for a LabVIEW driver that communicates with the APx500 software through the APx500 .NET API, then download the APx LabVIEW .NET Driver instead.




APx Python Sample Code 1.0 (40.18 KB)

IronPython is a version of Python that can interface with .NET Assemblies. This download includes an APx Project and a Python code sample that controls APx500 via the APx API.




APx VEE Example 1.0 (7.75 KB)

An Agilent VEE example that opens APx500, makes settings, and runs an acquisition. For more details about controlling APx500 using VEE, read the article "Using APx with VEE and MATLAB." After downloading, open in a text editor and modify the .NET references to refer to your current version of APx500.




APx Digital Serial I/O (DSIO) Configuration Files 4.3 (103 KB)

APx Digital Serial I/O configuration files for A/D, D/A, and sample rate converters. Simplifies configuring the analyzer. Requires: 1) APx500 measurement software and 2) an APx instrument with the DSIO option installed.




APx HDMI EDID Configuration Files 4.3 (32 KB)

APx with HDMI supports multiple EDID configurations. These .edid files are pre-configured for various audio formats including encoded audio such as DTS. Requires APx585 with HDMI hardware. Please consult APx User Manual for more information.




    APx Dolby Generator Waveforms: Dolby Digital 1.0 (19.55 MB)

    The APx Dolby Generator Waveforms support the APx500 generator waveform feature. Copy the folders to your PC and browse to the desired file from the Generator Waveform browser inside the APx500 application.

    Notes: These files are similar to the files of the same name and format available on the APx-BD1 Blu-ray disc. Some files have been shortened to accommodate the memory limitation for the generator waveform feature. A few files that could not be shortened have been omitted.




    APx Dolby Generator Waveforms: Dolby Digital Plus 1.0 (22.37 MB)

    The APx Dolby Generator Waveforms support the APx500 generator waveform feature. Copy the folders to your PC and browse to the desired file from the Generator Waveform browser inside the APx500 application.

    Notes: These files are similar to the files of the same name and format available on the APx-BD1 Blu-ray disc. Some files have been shortened to accommodate the memory limitation for the generator waveform feature. A few files that could not be shortened have been omitted.

    Download of this file is restricted to Dolby Licensees. If you are a Dolby licensee, please contact Audio Precision Technical Support supplying your Dolby License and AP web site login name to obtain download permissions.




    APx Dolby Generator Waveforms: Dolby TrueHD 1.0 (288 MB)

    The APx Dolby Generator Waveforms support the APx500 generator waveform feature. Copy the folders to your PC and browse to the desired file from the Generator Waveform browser inside the APx500 application.

    Notes: These files are similar to the files of the same name and format available on the APx-BD1 Blu-ray disc. Some files have been shortened to accommodate the memory limitation for the generator waveform feature. A few files that could not be shortened have been omitted.

    Download of this file is restricted to Dolby Licensees. If you are a Dolby licensee, please contact Audio Precision Technical Support supplying your Dolby License and AP web site login name to obtain download permissions.




    APx DTS Generator Waveforms: DTS Digital Surround 1.0 (43.67 MB)

    The APx DTS Generator Waveforms support the APx500 generator waveform feature and are encoded in the various DTS surround sound formats. Copy the folders to your PC and browse to the desired file from the Generator Waveform browser inside the APx500 application.

    Notes: These files are similar to the files of the same name and format available on the APx-BD1 Blu-ray disc. Some files have been shortened to accommodate the memory limitation for the generator waveform feature. A few files that could not be shortened have been omitted.




    APx DTS Generator Waveforms: DTS HD High Resolution 1.0 (0.00 KB)

    The APx DTS Generator Waveforms support the APx500 generator waveform feature and are encoded in the various DTS surround sound formats. Copy the folders to your PC and browse to the desired file from the Generator Waveform browser inside the APx500 application.

    Notes: These files are similar to the files of the same name and format available on the APx-BD1 Blu-ray disc. Some files have been shortened to accommodate the memory limitation for the generator waveform feature. A few files that could not be shortened have been omitted.




    APx DTS Generator Waveforms: DTS HD Master Audio 1.0 (0.00 KB)

    The APx DTS Generator Waveforms support the APx500 generator waveform feature and are encoded in the various DTS surround sound formats. Copy the folders to your PC and browse to the desired file from the Generator Waveform browser inside the APx500 application.

    Notes: These files are similar to the files of the same name and format available on the APx-BD1 Blu-ray disc. Some files have been shortened to accommodate the memory limitation for the generator waveform feature. A few files that could not be shortened have been omitted.




    APx FM MPX-RDS Waveforms 50 µs (except North America) 1.0 (0.00 KB)

    APx FM MPX-RDS Waveforms 50µs (except North America) contains a series of FM multiplex and RDS encoded waveforms for FM radio receiver testing with the APx Series analyzers. The test streams are versions of the stereo .wav files that can be created with the Audio Precision Waveform Generator Utility (WfmGeneration.exe), also available for download.

    Copy the folder to your PC and load the desired file using the generator waveform browser inside the APx500 application. Download Technote 105: FM Radio Receiver Testing with APx Audio Analyzers for a discussion on FM testing.




    APx FM MPX-RDS Waveforms 75 µs (North America) 1.0 (0.00 KB)

    APx FM MPX-RDS Waveforms 75µs (North America) contains a series of FM multiplex and RDS encoded waveforms for FM radio receiver testing with the APx Series analyzers. The test streams are versions of the stereo .wav files that can be created with the Audio Precision Waveform Generator Utility (WfmGeneration.exe), also available for download.

    Copy the folder to your PC and load the desired file using the generator waveform browser inside the APx500 application. Download Technote 105: FM Radio Receiver Testing with APx Audio Analyzers for a discussion on FM testing.




    APx Smartphone and Tablet Audio Test Signals 2.0 (0.00 KB)

    A comprehensive set of audio test files at 8k, 16k, 44.1k, and 48k sample rates for testing smartphones and tablets. Accompanies
    Technote 116: Testing Smartphones and Tablets, which is a separate download.

    APx Smartphone and Tablet Video Test Files is also available.




    APx Smartphone and Tablet Video Test Signals 3.0 (0.00 KB)

    A comprehensive set of MP4 video files with audio encoded in AAC, Dolby Digital 2.0, Dolby Digital 5.1, and Dolby Digital Plus 5.1 formats. Accompanies
    Technote 116: Testing Smartphones and Tablets, which is a separate download.

    APx Smartphone and Tablet Audio Test Files is also available.




    APx Test Signals on Disc Track List 3.0 (178.59 KB)

    The full track listings for all APx test signal discs: APx-BD1, APx-DVD1, and APx-CD1. These discs may be ordered from Audio Precision.

    Alternately, the linear test signals may be created using the APx Waveform Generator Utility (available as a download), and the Dolby and dts encoded versions may be downloaded as "APx Dolby Generator Waveforms" and "APx dts Generator Waveforms" respectively.




    ATS-2 1 kHz Test Signal with DC Offset 1.0 (1.54 KB)

    This signal accompanies the kb article "Generating Signals with a DC Component on the ATS-2." It contains a 1 kHz tone with a DC offset, for use with the arbitrary waveform generator feature.




    HDMI Plug Fest audio test signals 3.0 (141.51 MB)

    This compressed folder contains audio test signals required to do the most common tests for audio quality in several formats:

    (1) Linear PCM .wav files at 44.1 kHz sample rate and 16 bits (sub-folder PCM_44_16)

    (2) Linear PCM .wav files at 48 kHz sample rate and 24 bits (sub-folder PCM_48_24)

    (3) Dolby Digital 5.1 encoded .ac3 files (sub-folder DD_5.1)

    (4) Dolby Digital Plus 5.1 encoded .ec3 files (sub-folder DD+_5.1)

    (5) dts Digital Surround 5.1 encoded .ds.dtshd files (sub-folder dts_5.1)

    In order to test the audio quality of devices like set-top boxes, special audio test streams of known quality must be played from the set-top box into an audio analyzer. This usually requires that the audio streams be encoded into a format that can be streamed from the set-top box over HDMI,S/PDIF or TOSLINK. The audio test signals in this folder are provided for the convenience of set top box manufacturers who wish to test with Audio Precision at HDMI Plugfest. If you are a set top box manufacturer and you wish to test your device with Audio Precision at HDMI Plugfest, please arrange to have these audio test streams encoded and loaded onto your device before coming to Plugfest.




    Low Frequency Triangle Waves 1.0 (64.56 KB)

    Contains two triangle waves. Both are 24-bit with 16,384 samples and contain one cycle of a triangle wave. One has a frequency of 1.0 Hz and is sampled at 16.384 kHz. The other has a frequency of 2.926875 Hz and is sampled at 48 kHz. Designed to be loaded into the arbitrary waveform generator of the SYS-2722 analyzer.




    PESQ Speech Waveforms 4.3 (5.2 MB)

    This compressed file contains a copy of the PESQ speech waveforms installed with the APx500 audio measurement software. It is provided as a convenience for APx500 users who want the ability to download these files from the web.

    Please note: performing PESQ measurements with an APx audio analyzer does require the PESQ Perceptual Audio Test (SW-PESQ) software option. More information on perceptual audio testing with APx.




    Philips (OM&T) Audio Signals Disc 1 SBC429 Track List and Details 1.0 (228.76 KB)

    Accompanies "Philips (OM&T) Audio Signals Disc 1 SBC429," sold by AP as part number DSK-PHI. The disc contains a collection of audio signals for testing CD players. This document includes a detailed discussion of every track on the disc. 17 pp




      2700 Series & System Two Performance Check 1.24 (3.25 MB)

      Performance Check for all System Two and 2700 Series instruments. Running the Performance Check verifies proper instrument operation, and provides diagnostic data for Technical Support evaluation before sending an instrument in for service.




      2700 Series S-AES17 and OPT-2020 Filter Set Bit Macro 1.0 (3.78 KB)

      This AP Basic macro reads or sets the 2700 series instrument EEPROM firmware configuration to indicate the currently installed pre-analyzer filter (S-AES17 or OPT-2020). If you install or remove pre-analyzer filter hardware, you must set the EEPROM configuration for correct software operation. Requires AP2700 or APWIN version 2.24 or later control software.




      AP Basic Scripting Sample Files 1.0 (65.50 KB)

      These files accompany the "AP Basic Scripting" training video found at http://ap.com/support/training




      AP2700 & ATS-2 Resources Disc 102 (24.60 MB)

      The Audio Precision Resources Disc contains Sample Tests, the Performance Check and documentation to help you operate your AP2700 or ATS control software compatible audio analyzer. AP2700 or ATS control software is required. The installer includes both AP2700 and ATS-2 resources. You will be prompted to choose which components you wish to install.




      AP2700 ADSR Measurement Test 1.0 (92.50 KB)

      This measurement looks at the four segments of an envelope expressed as amplitude vs. time; Attack, time for a signal to reach full amplitude, Decay, time for the signal to drop from the initial attack level to the sustain level, Sustain, time the signal remains at the constant amplitude, and Release, time for the signal to return to an off or zero amplitude condition.




      AP2700 and ATS Get all FFT Bins Macro 1.0 (2.07 KB)

      Illustrates setting up the sweep panel to return all FFT bins. For 2700 Series and ATS-2. The macro includes a function that gets the Sample Rate and FFT length, and in addition to setting up the sweep panel, it retrieves the FFT level spectrum in units of Volts.




      AP2700 and ATS Graph Trace Setting Macro 1.0 (329.03 KB)

      Lets you set the graph trace properties quickly (line color, thickness, pattern, comments), even if you aren't otherwise using macros or automation, by adding this macro to your Quick Launch toolbar.
      Zip file includes macros for AP2700 and ATS, and Quick Launch installation instructions.




      AP2700 and ATS Split Stereo Waveform Macros 1.0 (0.92 KB)

      The ATS-2 and 2700 Series GPIB implementation requires that waveforms loaded into the analog and digital Arbitrary waveform buffers be mono files. Many of the sample waveforms provided for the two instruments are Stereo. This download contains two macros, one for each instrument, that can be used to split the stereo waveform into mono files.




      AP2700 AP Basic RS-232 OLE Control 1.0 (49.48 KB)

      Installation of this file restores RS-232 control in AP Basic macros, where the original file has gotten corrupted or is not provided by the operating system (Windows Vista and 7). See the related KB article for installation instructions. When the file is corrupted or missing, the following error message appears:

      "Communications control MScomm32.ocx could not be loaded."

      This issue has been corrected in AP2700 v3.30 SP1. We recommend that you download and install SP1 or later instead of just replacing this file, as it addresses some other issues as well as adds a driver for 64-bit versions of Windows.




      AP2700 Burst THD-IMD Macro 2.0 (39.77 KB)

      Series of macros written to support KB article http://ap.com/kb/87 on THD & IMD Measurements of Power Amplifiers with Short Duration Signals




      AP2700 Complex Impedance Macros 1.0 (185.89 KB)

      Includes instructions and discussion.




      AP2700 Crest Factor Test 1.0 (67.00 KB)

      File configured to measure crest factor. See knowledge base article for complete explanation.




      AP2700 Damping Factor and Output Impedance Measurement Macro 2.0 (10.38 KB)

      Measures and graphs the damping factor and output impedance vs. frequency of a power amplifier.




      AP2700 DIM Measurement Macro 1.0 (4.10 KB)

      Accompanies KB article "DIM 30 and DIM 100 Measurements per IEC 60268-3 with AP2700"




      AP2700 FFT Scaling for Noise Macro 1.0 (105.17 KB)

      AP2700 macro and test file to accompany the KB article "FFT Scaling for Noise."

      Contains several functions that are useful for performing calculations on FFT spectra, including FFT spectrum integration with window correction. There is also a subroutine that will convert a measured FFT spectrum to amplitude spectral density in dB relative to 1.0 V/√Hz, or FS/√Hz, and plot it on the graph.




      AP2700 Frequency Error Correction Test 1.0 (94.00 KB)

      This AP2700 test file accompanies the KB article "Syncing the 2700 Series Generator to an External Reference."




      AP2700 GraphBuilder Macro 2.0 (4.42 MB)

      GraphBuilder is a macro that extends the two-dimensional graph capability built into AP2700 and ATS control software to include three dimensional and polar graphs. For use with APWIN, download the previous version (1.1).




      AP2700 I2S Jitter Measurement Test 1.0 (94.00 KB)

      This file accompanies the knowledge base article "I2S jitter measurement with the SYS-2722." It demonstrates how to measure digital interface jitter using the digital unbalanced input of the instrument.




      AP2700 Instrument and APIB Bus Hardware Interrogator Macro 1.0 (9.30 KB)

      This AP2700 macro interrogates the System Two Family analyzer and APIB bus, and displays a list of all attached instruments and options.




      AP2700 Momentum DSP Filter Design Package 1.0 (1.07 MB)

      The Audio Precision Filter Design Package (APFDP) has been produced by Momentum Data Systems, Inc., to allow the user to create DSP filters for downloading to Audio Precision System Two Cascade hardware.

      The manual below explains the operation of APFDP. It is not intended to be a tutorial on digital signal processing, since there are many excellent texts on the subject, and it is assumed that the user has had a certain amount of academic or professional exposure to the subject.

      More advanced versions of this software are available, including versions enabling the design of finite impulse response (FIR) filters. These versions also support more powerful filter design techniques. Please call Momentum Data Systems for further information.

      Zip file contains

      APFDP manual (.pdf file)
      APFDP Executable application (.exe file)
      4 sample test tiles (.spc file)
      Read me (.txt file)




      AP2700 Polar Plots 1.0 (1.73 MB)

      Although the AP2700 Control Software does not include polar plotting, you can export measurement data to the plotting program of your choice.




      AP2700 Prompt Using Windows API Macro 1.0 (2.91 KB)

      This AP Basic macro demonstrates the use of a modified AP.Prompt for use in control loops. It allows the AP.Prompt text to be changed while a prompt is displayed without flashing or refreshing the entire prompt window.




      AP2700 PSRR Test 1.0 (13.14 KB)

      Tests PSRR (power supply rejection ratio). See the associated KB article for instructions. Contains .at27 test and .ads sweep file.




      AP2700 Sample Rate Error Measurement Macros 2.0 (671.41 KB)

      Many devices contain internal clocks that are not accessible but that need to be measured. Examples include the A/D converters in USB headsets, and the D/A converters in MP3 players and smart phones. The internal sample rate error of these types of devices can be indirectly determined by measuring the frequency error of a known tone. This download contains two AP2700 macros that calculate the error. See the associated KB article for instructions.




      AP2700 Send Bar Graph Data to Serial Port Macro 1.0 (10.73 KB)

      Macro and test file demonstrate how to send a bar graph reading to an RS-232 serial port.




      APx Active Loadbox Utility 4.2 (204.36 MB)

      Integrates APx with AudioGraph’s Active Loadbox for automated and comprehensive power amplifier load measurements. Requires the Active Loadbox hardware for use.

      An overview of the measurement principles and detailed usage instructions is contained in the KB article: Measuring Power Amplifiers with Reactive Loads.




      APx Active Loadbox Utility 4.3 (218.5 MB)

      Integrates APx with AudioGraph's Active Loadbox for automated and comprehensive power amplifier load measurements. Requires the Active Loadbox hardware for use.

      An overview of the measurement principles and detailed usage instructions is contained in the KB article:Measuring Power Amplifiers with Reactive Loads.




      APx Barcode Scanner Interface 3.2 (876.59 KB)

      A barcode scanner may be useful in production testing, not only to expedite data entry, but to eliminate the possibility of initiating the wrong test routine. The APx Barcode Scanner Interface is a small VB.net application (Run_Barcode_Project_ID.exe) that automatically loads an APx project who's name matches the barcode data.




      APx Blu-ray Disc Sample Project 1.0 (99.52 KB)

      APx Blu-ray Disc Sample Project with instructions. Requires APx585 with HDMI.




      APx Bode Plot Project 1.0 (942.98 KB)

      An APx project that creates reports in Bode Plot format. Requires APx500 v3.2 or later.




      APx Burst Waveform Utility 4.2 (166.55 MB)

      This utility creates sine burst waveforms and then saves them and/or uploads them into the APx generator. Burst waveforms can be useful in testing a number of properties, including power supply transient response and reserve, meter ballistics, and compressor/limiter behavior.




      APx Burst Waveform Utility 4.3 (166.74 MB)

      This utility creates sine burst waveforms and then saves them and/or uploads them into the APx generator. Burst waveforms can be useful in testing a number of properties, including power supply transient response and reserve, meter ballistics, and compressor/limiter behavior.




      APx C++ Examples 1.0 (13.36 MB)

      The APx500 software API is designed for use with the .NET Framework. The API is written entirely with managed code, and is not designed for use with COM or legacy VB/C++ applications. However, .NET interfaces can be called from non .NET applications with the proper steps.

      There are two main approaches to calling .NET interfaces from Visual C++ applications. The first approach adds Common Language Runtime (CLR) support to your existing C++ applications using the new C++/CLI language features of Visual Studio. This feature is available in Visual Studio 2008 or higher. The second approach involves creating a wrapper DLL which has a COM interface. The wrapper DLL will be a C++/CLI DLL, and will expose an interface that can be called from unmanaged C++.




      APx Channel ID Test Sample Project (APx585) 1.0 (2.13 MB)

      Channel ID Test on APx585 Sample project for KB Article 103




      APx Click and Pop Measurement Projects 1.0 (56.38 KB)

      For use with the APx Sound Level Meter Utility. See the associated KB article on Click and Pop Measurement for full discussion and instructions.




      APx Click and Pop Measurement Projects 4.3 (187.76 MB)

      For use with the APx Sound Level Meter Utility. See the associated KB article on Click and Pop Measurement for full discussion and instructions.




      APx Damping Factor Measurement Utility 4.2 (167.85 MB)

      The APx Damping Factor Measurement Utility plots audio amplifier damping factor vs. frequency.

      The version number of this utility must match the version of the APx500 software that you are running.




      APx Damping Factor Measurement Utility 4.3 (176.2 MB)

      The APx Damping Factor Measurement Utility plots audio amplifier damping factor vs. frequency.

      The version number of this utility must match the version of the APx500 software that you are running.




      APx EQ .wav Files Utility 1.04 (204.42 MB)

      The APx EQ .wav Files Utility lets you apply equalization to generator source .wav files. When given an original .wav file and an EQ curve file, it creates a new EQed .wav file. Includes both graphic interface and command line versions. The utility is useful to EQ PESQ generator files for a given stimulus speaker. Download includes instructions. Note that any version of APx500 may be used with this utility, and version numbers do not correspond to APx500 versions.




      APx EQ .wav Files Utility 4.3 (199.80 MB)

      The APx EQ .wav Files Utility lets you apply equalization to generator source .wav files. When given an original .wav file and an EQ curve file, it creates a new EQed .wav file. Includes both graphic interface and command line versions. The utility is useful to EQ PESQ generator files for a given stimulus speaker. Download includes instructions. Note that any version of APx500 may be used with this utility, and version numbers do not correspond to APx500 versions.




      APx Equalized THD Measurement Utility 1.0 (366.99 KB)

      This utility allows you to calculate post equalization THD on-the-fly. The utility operates from the command line (no user interface) and is called during an APx project by adding a Program step to the sequencer. Includes complete instructions and project file.




      APx FFT to Octave Conversion Utility 4.2.1 (135.17 MB)

      Converts FFT spectra to fractional octave spectra. Includes instructions which discuss the theory behind the conversion.




      AP2700 Add-ins 3.30 (742.75 KB)

      dd-Ins are additional software features that can be seamlessly integrated into the AP2700 user interface.
      AP uses the standard Windows "Add/Remove Programs" exclusively to manage Add-Ins.

      Add-In Descriptions

      User Preferences -- Provides a user interface where you can set user preferences, define multiple preference groups and control how the preferences are applied to tests.

      Document Test Settings -- Creates an ASCII text file that documents selected panel settings for the current test configuration.

      Delete Traces-- Provides the capability to delete selected traces from the Graph / Data Editor. Sweeps that have any traces removed from view in the Graph are deleted.




      AP2700 and ATS Windows APIB Drivers 1.0 (187.00 KB)

      Audio Precision's proprietary APIB interface bus requires the installation of the proper Windows driver software on your PC.




      AP2700 and ATS Windows USB Drivers (107.81 KB)

      Drivers for running AP2700 and ATS software in Windows 7 and 8 using the AP USB-APIB Adapter. Includes instructions. See the KB article AP Software Windows Version Compatibility for more information.




      AP2700 MLS Quick Launch Macro (14.51 KB)

      Resolves an error with the MLS Quick Launch macro in AP2700 v3.3. When the MLS Quick Launch icon is clicked, and then the sweep Go button is clicked, the following message is displayed: "Error 18020: Channel 1 De-emphasis overload detected" Unzip this file, and save the two resulting files in the "My DocumentsAudio PrecisionAP2700 3.30Quick Launch" directory, replacing the ones currently there. This will fix the problem.




      APx STI Plug-in 1.1 (196.79 MB)

      For designers of public address, flight recorder and police/fire/emergency communications systems, the APx Speech Transmission Index (STI) plug-in is a software add-on for the APx500 that provides a STIPA measurement and Speech Level measurement conforming to international standard IEC 60268-16 (2011).

      NOTE: The STI plug-in is a software option and requires the purchase of an iButton (APX-SW-STI) for measurement functionality. Download and installation of the plug-in, without an iButton, enables the measurement in demo mode only. The APx STI plug-in requires v4.2.1 or later of APx500 audio test software.




      APx500 USB Driver Update for APx500 3.4.3 (532.57 KB)

      USB driver update for users of APx500 v2.3 - 3.4 running on Windows Vista, 7, and 8. Apply this update if you encounter the following symptoms:
      1) During installation of APx500 you receive one or both of the following warnings:

      - User Account Control (UAC) warning: "Do you want to allow the following program from an unknown publisher to make changes to this computer?"

      - Windows Security warning: "Windows can't verify the publisher of this driver software."

      2) APx500 fails to recognize an attached APx analyzer (runs only in demo mode).

      Download this update and run it after installation of APx500 and then power-cycle the attached APx analyzer.




      ATS-2 Add-ins 1.6 (518.74 KB)

      Add-Ins are additional software features that can be seamlessly integrated into the ATS-2 user interface.
      AP uses the standard Windows "Add/Remove Programs" exclusively to manage Add-Ins.

      Add-In Descriptions

      User Preferences -- Provides a user interface where you can set user preferences, define multiple preference groups and control how the preferences are applied to tests.
      Document Test Settings -- Creates an ASCII text file that documents selected panel settings for the current test configuration.
      Delete Traces -- Provides the capability to delete selected traces from the Graph / Data Editor. Sweeps that have any traces removed from view in the Graph are deleted.