Utilities, Projects & Macros


FREQUENT DOWNLOADS





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 Active Loadbox Utility 4.4 (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 Burst Waveform Utility 4.4 (171.58 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 4.4 (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 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 Damping Factor Measurement Utility 4.4 (174.4 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 (209.3 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 4.4 (143.78 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.