APx515 Downloads


 

 

 

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

NOTE: APx API Developer Tools are specific to each release of APx500 (e.g., APx API Developer Tools v4.2.x can only be used with APx500 Software v4.2.x).




APx Introduction to Programming the APx500 API 5.0 (1.28 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 (e.g., APx LabVIEW Driver v5.0.x can only be used with APx500 Software v5.0.x). 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 (e.g., APx LabVIEW Driver v5.0.x can only be used with APx500 Software v5.0.x). Requires LabVIEW 2012 or higher.




APx LabVIEW .NET Driver 4.4 (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 (e.g., APx LabVIEW Driver v5.0.x can only be used with APx500 Software v5.0.x). Requires LabVIEW 2012 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 WaveReader DLL 4.2 (11.04 KB)

The WaveReader DLL provides functions that can be called from an external program, to enable transfer of acquisition data from an APx analyzer to that program in near real time. Any .NET compliant language such as C#, VB.NET, or LabVIEW can make use of it.




    APx500 Series Audio Analyzers - Comparison Sheet (449 KB)

    A two-page overview of the APx500 Series audio analyzers, including summary specification comparison tables.




    APx515 Datasheet (3.5 MB)

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




    Electro-Acoustic Options Datasheet (406 KB)

    A single sheet description of APx Electro-Acoustic software options, including Thiele-Small characterization, Rub & Buzz detection and Loudspeaker Production Test.




    Perceptual Audio Test Datasheet (394.40 KB)

    Datasheet for APx PESQ and POLQA software options




      APx500 Measurement Software 4.6 (227.2 MB)

      APx500 measurement software for all APx Series instruments.

      IMPORTANT: Release version 4.6 requires an APx KeyBox be installed on your APx Series audio analyzer. APx v4.6 will not operate (except in demo mode) without a KeyBox installed. For additional information on the APx KeyBox, including how to request one free-of-charge, please see the following resources:

      Additional information regarding APx500 measurement software:

      1. AP Software and Windows Compatibility chart
      2. APx500 v4.5 (or newer) requires a Windows 64-bit operating system.
      3. 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.
      4. 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.



      APx500 Measurement Software 6.0 (352 MB)

      Version 6.0 is the current release of APx500 audio measurement software, and is shipping with all new B Series APx audio analyzers.

      New Feature: the version 6.0 release of APx500 software supports multiple simultaneous input types, enabling the concurrent measurement of up to 16 channels of digital and 8 channels of analog audio data.

      New analyzers include one year of software maintenance, licensing that instrument for APx version 7.0 when it is released, as well as any minor releases that occur between versions 6.0 and 7.0. Release 6.0 is compatible with all analyzers in the APx500 Series, however an APx KeyBox is required to run v6.0 on Legacy APx analyzers.

      IMPORTANT: Beginning with version 5.0, a paid license is required to run each major release (e.g., v5.0, v6.0, etc.) of APx500 audio measurement software.

      Software Licensing FAQ

      Additional information regarding APx500 measurement software:

      1. AP Software and Windows Compatibility chart
      2. APx500 software v6.0 requires the Windows 10 64-bit operating system.
      3. 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.
      4. 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.



      APx500 Measurement Software (with .NET) 5.0.3 (407.4 MB)

      IMPORTANT: Beginning with release 5.0, a paid license is required to run APx500 audio measurement software. See below for details:

      Version 5.0 is the current release of APx500 audio measurement software, and is shipping with all new APx audio analyzers, whether B Series or Legacy. New analyzers include one year of software maintenance, licensing that instrument for APx version 6.0 when it is released, as well as any minor releases that occur between versions 5.0 and 6.0. Release 5.0 is compatible with all analyzers in the APx500 Series, however an APx KeyBox is required to run v5.0 on Legacy APx analyzers.

      Customers who purchased an APx analyzer in 2018 are entitled to a complimentary license for version 5.0 and should contact their AP sales representative. Options for extended software maintenance are also available.

      Owners of Legacy APx analyzers delivered in 2017 or earlier will need to purchase a software upgrade to use version 5.0 and the new transfer function measurement. Software maintenance contracts are likewise available for purchase, entitling the user to an additional major software release.

      Software Licensing FAQ

      Additional information regarding APx500 measurement software:

      1. AP Software and Windows Compatibility chart
      2. APx500 software v5.0 requires Windows 10, or Windows 8, 64-bit operating systems.
      3. 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.



      APx500 Measurement Software (with .NET) 6.0 (417 MB)

      Version 6.0 is the current release of APx500 audio measurement software, and is shipping with all new B Series APx audio analyzers.

      New Feature: the version 6.0 release of APx500 software supports multiple simultaneous input types, enabling the concurrent measurement of up to 16 channels of digital and 8 channels of analog audio data.

      New analyzers include one year of software maintenance, licensing that instrument for APx version 7.0 when it is released, as well as any minor releases that occur between versions 6.0 and 7.0. Release 6.0 is compatible with all analyzers in the APx500 Series, however an APx KeyBox is required to run v6.0 on Legacy APx analyzers.

      IMPORTANT: Beginning with version 5.0, a paid license is required to run each major release (e.g., v5.0, v6.0, etc.) of APx500 audio measurement software.

      Software Licensing FAQ

      Additional information regarding APx500 measurement software:

      1. AP Software and Windows Compatibility chart
      2. APx500 software v5.0 requires the Windows 10 64-bit operating system.
      3. 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.



      APx500 Measurement Software (with .NET) 4.6 (291.9 MB)

      APx500 measurement software for all APx Series instruments.

      IMPORTANT: Release version 4.6 requires an APx KeyBox be installed on your APx Series audio analyzer. APx v4.6 will not operate (except in demo mode) without a KeyBox installed. For additional information on the APx KeyBox, including how to request one free-of-charge, please see the following resources:

      Additional information regarding APx500 measurement software:

      1. AP Software and Windows Compatibility chart
      2. APx500 v4.5 (or newer) requires a Windows 64-bit operating system.
      3. 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.



      APx500 What's New 1.0 (200.33 KB)

      Describes new features in the latest release of the APx500 measurement software. Additional information can be found in the latest Read Me.




      APx500 What's New 5.0.3 (244 KB)

      Describes new features in the latest release, v5.0, of the APx500 measurement software. Additional information can be found in the latest ReadMe, which is included in the software download.




      APx500 What's New 6.0 (423 KB)

      Describes new features in the latest release, v6.0, of the APx500 measurement software. Additional information can be found in the latest ReadMe, which is included in the software download.




        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.




        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.




          APx515 Installation Instructions and Full Specifications 5.0 (1.6 MB)

          Installation and Specifications for the APx515 Audio Analyzer.




            APx Speaker Impedance Measurement Project 1.0 (176.61 KB)

            This project measures loudspeaker impedance using the constant voltage method.

            Complete instructions and explanation are in the KB article Measuring Loudspeaker Impedance Using APx Derived Measurement Results.

            An external sense resistor is required for this project. The
            APx Speaker Impedance Measurement Utility
            also available for download, can utilize the built-in source resistor in APx analyzers.




            APx Speaker Impedance Measurement Utility 3.3.1 (135.83 MB)

            This utility for APx analyzers allows you to make an impedance vs frequency sweep across a loudspeaker, and then see the graph and data results directly in ohms. Clicking Help in the utility will display the complete instructions, including a discussion of the theory behind it. It can utilize the built-in source resistor on APx analyzers to make impedance measurements.

            NOTE:This utility is only compatible with APx500 Software v3.3 or earlier. For users with APx500 v3.4 or later, options APX-SW-SPK-RD&l and APX-SW-SPK-PT provide a range of acoustic measurements, with SPK-RD including Thiele-Small characterization. An impedance-only alternative is also available for download and is compatible with APx500 v3.4 and later, please see the APx Speaker Impedance Measurement Project. This project requires an external sense resistor and uses the constant voltage method.




            APx Splice Utility 2.0 (2.80 MB)

            Splice is a CLI utility that combines separate LF and HF measurements into a single full frequency response result.




            APx THD Sweep Individual Harmonics Project 3.0 (40.48 KB)

            Produces a separate trace for each harmonic H2 through H10 (can be extended to H20), as both a level and as a ratio, and displays them all on one graph. Each harmonic can easily be enabled or hidden. Makes use of the Export Data and Import Data steps in the automated project sequencer. I/O connectors and measurement bandwidth should be set in Signal Path Setup before running. This project will open in APx500 v3.0 or later.




            APx TTA Speaker Test Utility 4.2 (137.69 MB)

            This APx utility facilitates testing of small loudspeakers according to requirements of the South Korea Telecommunications Technology Association (TTA) Standard number TCB-0054(00), "TTA Verified Testing Criteria for Micro/Slim Speakers" using an Audio Precision APx500 Series audio analyzer.

            Note that the version of this utility must match the version of APx500 that you are using it with.




            APx TTA Speaker Test Utility 4.3 (137.7 MB)

            This APx utility facilitates testing of small loudspeakers according to requirements of the South Korea Telecommunications Technology Association (TTA) Standard number TCB-0054(00), "TTA Verified Testing Criteria for Micro/Slim Speakers" using an Audio Precision APx500 Series audio analyzer.

            Note that the version of this utility must match the version of APx500 that you are using it with.




            APx TTA Speaker Test Utility 4.4 (140.77 MB)

            This APx utility facilitates testing of small loudspeakers according to requirements of the South Korea Telecommunications Technology Association (TTA) Standard number TCB-0054(00), "TTA Verified Testing Criteria for Micro/Slim Speakers" using an Audio Precision APx500 Series audio analyzer.

            Note that the version of this utility must match the version of APx500 that you are using it with.




            APx Waterfall-CSD Plot Utility 4.2 (180.07 MB)

            The APx500 CSD Utility is a Windows application for making a Cumulative Spectral Decay (CSD) plot, sometimes referred to as a waterfall plot, from the measured impulse response of a loudspeaker.

            The APx CSD utility also requires the SPK-RD software option to be installed on the connected APx audio analyzer. If you require a SPK-RD software option, please contact your Audio Precision sales representative.




            APx Waterfall-CSD Plot Utility 4.3 (189.2 MB)

            The APx500 CSD Utility is a Windows application for making a Cumulative Spectral Decay (CSD) plot, sometimes referred to as a waterfall plot, from the measured impulse response of a loudspeaker.

            The APx CSD utility also requires the SPK-RD software option to be installed on the connected APx audio analyzer. If you require a SPK-RD software option, please contact your Audio Precision sales representative.




            APx Waterfall-CSD Plot Utility 4.4 (184.24 MB)

            The APx500 CSD Utility is a Windows application for making a Cumulative Spectral Decay (CSD) plot, sometimes referred to as a waterfall plot, from the measured impulse response of a loudspeaker.

            The APx CSD utility also requires the SPK-RD software option to be installed on the connected APx audio analyzer. If you require a SPK-RD software option, please contact your Audio Precision sales representative.




            APx Waveform Computes Utility 2.0 (543.49 KB)

            The APx Waveform Computes Utility extends the capabilities of APx500 by making Fast RMS (root mean square) measurements. Additionally, it utilizes Fast RMS for a number of useful tasks: audio/video synchronization, dropout detection, and pop/click detection. Download includes utility, instructions, and example project file.




            APx Waveform Generator Utility 4.2 (202.40 KB)

            The Waveform Generator Utility (APxWfmGenerator.exe) allows you to generate .wav files for a wide range of test signals, with selectable sample rates, bit depths and channel counts.

            You are free to copy this utility to other computers or media, where you can generate the audio files you may need for external source testing.

            Note that the version number of this utility does not correspond to APx500 software versions and APx500 is not required.




            APx Wow and Flutter Measurement Utility 4.2 (168.78 MB)

            Enables an APx500 audio analyzer to measure wow and flutter, according to standard “AES 6-2008—Method for Measurement of Weighted Peak Flutter of Sound Recording and Reproducing Equipment” (IEC 60386 Weighted). Includes an FFT of the demodulated waveform, as well as an unweighting option.




            APx Wow and Flutter Measurement Utility 4.3 (168.97 MB)

            Enables an APx500 audio analyzer to measure wow and flutter, according to standard "AES 6-2008 - Method for Measurement of Weighted Peak Flutter of Sound Recording and Reproducing Equipment" (IEC 60386 Weighted). Includes an FFT of the demodulated waveform, as well as an unweighting option.




            APx Wow and Flutter Measurement Utility 4.4 (172.73 MB)

            Enables an APx500 audio analyzer to measure wow and flutter, according to standard "AES 6-2008 - Method for Measurement of Weighted Peak Flutter of Sound Recording and Reproducing Equipment" (IEC 60386 Weighted). Includes an FFT of the demodulated waveform, as well as an unweighting option.




            APx Wow and Flutter Measurement Utility 5.0 (193 MB)

            Enables an APx500 audio analyzer to measure wow and flutter, according to standard "AES 6-2008 - Method for Measurement of Weighted Peak Flutter of Sound Recording and Reproducing Equipment" (IEC 60386 Weighted). Includes an FFT of the demodulated waveform, as well as an unweighting option.




            Leveled Acoustic Output Project 4.5 (633 KB)

            Automates procedure of leveled acoustic output when testing acoustic input devices such as microphones, as fully described in Technote 127.




            Matlab Toolbox 5.1 (22.63 KB)

            Set of MATLAB functions for audio applications such as reading and writing waveforms and filters for 2700, ATS-2, and APx




            Smartphone Audio Test App 2.2 for Android (228.3 MB)

            Audio Precision's Smartphone audio test app for Android allows for full testing of audio pathways, including Bluetooth HFP and A2DP, without initiating a call over the network. It supports Android versions 4, 5, 6, 7, 8, and 9.

            This zip file includes a copy of Technote 120, which describes and explains the use of the APx Smartphone app for Android-based devices.

            NOTE: this app requires an APx analyzer and a PC running APx500 measurement software v4.6 or later.

             




            How to Write (and Read) Audio Specifications (404.34 KB)

            Discusses writing and reading good audio specifications. Guidelines are provided, then key specifications for two classes of audio device are examined for correct expression and form, with examples of real-world specs for comparison.




            Measuring Switch-mode Power Amplifiers (1.80 MB)

            Switch-mode audio power amplifiers are becoming increasingly popular due to their smaller size, lower weight, and improved efficiency. Their advantages are obvious in low power battery operated personal audio players and laptop computers. However they are also progressively displacing more traditional linear designs in mainstream applications such as home entertainment systems, automotive sound systems, and professional installations where high quality audio is important. Measuring the performance of switch-mode amplifiers presents some new and unique challenges. They inherently generate ultra-sonic artifacts and spurious signals with slew rates that can provoke non-linear behavior within the input stages of high quality audio test and measurement equipment. Absolutely worthless and inaccurate results can result unless effective measures are taken to prevent this non-linear behavior. Written by Bruce Hofer.




            The Audio Measurement Handbook (1.60 MB)

            This reference handbook is a practical, hands-on guide for workers in all phases of the audio field. It covers basic tools and techniques, common environments for audio testing, application of these techniques to common audio devices, the typical ranges of performance to expect in different devices, and a glossary of terms and key specifications used in audio measurement. 178 pages Written by Bob Metzler.




              APx Attack-and-Release Plugin 1.0 (1.73 MB)

              Automatic Gain Control (AGC) is a signal processing technique typically used to limit the audio dynamic range in applications ranging from hearing aids to broadcasting. AP’s latest plugin enables the characterization of attack-and-release (recovery) times for AGC-enabled devices and allows the user to perform the tests according to several different standards, from IEC 60268-8 for general purpose AGC devices to IEC 60118-2 and ANSI S3.22 for hearing aids. Test settings can also be customized when using the IEC 60268-8-based measurement.

              The plugin is compatible with any model APx500 Series analyzer and requires APx audio measurement software, version 4.3 or later.




              APx STI Plugin 1.1 (196.79 MB)

              For designers of public address, flight recorder and police/fire/emergency communications systems, the APx Speech Transmission Index (STI) plugin 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).

              Technote 128: Speech Transmission Index Measurement with APx Audio Analyzer

              NOTES:

              • The STI plugin is a software option and requires the purchase of an iButton (APX-SW-STI) for measurement functionality. Download and installation of the plugin, without an iButton, enables the measurement in demo mode only.
              • APx STI Plugin v1.1 requires v4.2.1, v4.3 or v4.4.2 of APx500 audio test software. (For versions 4.5 or later of APx500 audio software, please use APx STI v2.0.)



              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.




                AP Applied: Acoustic Response (936.73 KB)

                A look at some of the important features needed in an acoustic audio analyzer, the problems you may encounter in non-ideal testing environment, the needs of good production line testing, and the range of measurements and results that should be produced.




                AP Applied: APx Automation with LabVIEW (1.19 MB)

                Describes using LabVIEW with APx in a lab or automated production environment. Examples using the APx LabVIEW virtual instrument driver are shown.




                AP Applied: Calculating ROI of Audio Test in Production (1.27 MB)

                Cost benefit analysis of high performance, low price audio test equipment in production.




                AP Applied: Digital Protocol Analysis (1.06 MB)

                Explains the various ways to view, measure, and manipulate digital metadata, primarily over the HDMI interface.




                Dolby MS11 Compliance Testing with APx500 Series Audio Analyzers (1,023.45 KB)

                In collaboration with Dolby engineers, Audio Precision has developed APx-based test solutions, available to Dolby licensees, to support both the Dolby Digital Plus Consumer Decoder SDK and the MS11 Multistream Decoder SDK. In the case of Dolby Digital Plus, compliance testing includes well over 1,200 individual measurements which, if performed manually, could easily take over a week. The APx solution reduces that time to hours. More importantly, because APx generates the test sequence with all appropriate limits, there is no time wasted on recreating a test methodology or deciphering test requirements. Since Dolby MS11 also supports Dolby Digital Plus, this application note primarily focuses on the MS11 SDK test solution.