AP - The Recognized Standard In Audio Test

The Audio Precision “System One” product family has been out of production since 2002, and is now considered obsolete.  Adjustment and repair services, along with replacement parts and/or modules are no longer available from Audio Precision. 

As a courtesy to those who desire to continue supporting these classic products, Audio Precision hereby provides all the System One references available from Audio Precision .  This information is provided as-is, and without warranty of any kind.  Persons attempting to service, repair, or adjust a System One product do so at their own risk.     

Control Software & Utilities

APWIN Control Software
Latest version: v2.24 (24.1 MB)
Previous versions: View all

S1.EXE Control Software for System One
Latest version: v2.10a (175.1 KB)
Previous versions: View all

AP2700 and ATS Windows APIB Drivers
Latest version: v1.0 (187 KB)
Previous versions: View all

 

Manuals

System One DSP User Manual
Latest version: v2.10a (4.5 MB)
Previous versions: View all

APWIN User's Manual Addendum
Latest version: v2.22 Rev 0 (838.9 KB)
Previous versions: View all

System One Training Pt 2: Intro
Latest version: v1 (155.1 MB)
Previous versions: View all

System One GPIB Programmer's Reference Manual
Latest version: v2.10a (10 MB)
Previous versions: View all

System One Optional Filter Installation Guide
Latest version: vRev 1 (511.2 KB)
Previous versions: View all

System One Service Manual
Latest version: v1 (47.8 MB)
Previous versions: View all

APWIN User's Manual for System One
Latest version: v2.0 Rev 1 (10.4 MB)
Previous versions: View all

2700 Series User-built Weighting Filter Construction Guide
Latest version: v4 (442.3 KB)
Previous versions: View all

APWIN Simplified for System One
Latest version: v2.0 Rev 0 (6.2 MB)
Previous versions: View all

AP Basic Language Manual
Latest version: v4 (1.4 MB)
Previous versions: View all

APWIN Basic Extensions for System One
Latest version: v2.0 (2.8 MB)
Previous versions: View all

System One Installation & Getting Started Manual
Latest version: v2.0 Rev 3 (4.1 MB)
Previous versions: View all

System One User Manual
Latest version: v2.10d (5.2 MB)
Previous versions: View all

Training videos

Technotes & Appnotes

Technote 15: GPIB Communication from AP Basic
Latest version: (739.3 KB)
Previous versions: View all

Technote 4: Computing Equalization Curves Using EQCURVE.EXE
Latest version: (45.2 KB)
Previous versions: View all

Technote 17: Computing THD Measurements from FFT Data Using THD.exe
Latest version: (47.9 KB)
Previous versions: View all

Technote 5: Usage Instructions for COMBINEC.EXE
Latest version: (37.7 KB)
Previous versions: View all

Technote 6: Computing Statistical Data From Nested Sweeps Using NSWEEP.exe
Latest version: (46.1 KB)
Previous versions: View all

Technote 7: Programmers' Reference to S1.exe internal *.tst file format
Latest version: (81.5 KB)
Previous versions: View all

Technote 20: Return Loss Measurements
Latest version: (194.3 KB)
Previous versions: View all

Technote 19: Create an HTML-Based Help System for APWin Basic Procedures
Latest version: (262.7 KB)
Previous versions: View all

Technote 30: .WAV file Import
Latest version: (163.5 KB)
Previous versions: View all

Technote 8: Programmers' Reference to S1.exe DSP Waveform File Format
Latest version: (79.8 KB)
Previous versions: View all

Technote 9: Restructuring Multitrack Data Using MTRACKFR.exe
Latest version: (48 KB)
Previous versions: View all

Technote 109: System One DOS Migration to APx
Latest version: v0 (1.6 MB)
Previous versions: View all

Technote 10: SWR-122 Series Switchers APIB Interface Description
Latest version: (64.4 KB)
Previous versions: View all

Technote 1: Generating Impedance vs. Frequency Plots with System One
Latest version: (53.1 KB)
Previous versions: View all

Technote 110: Legacy Instrument Migration to APx
Latest version: v0 (1.8 MB)
Previous versions: View all

Technote 11: Remote Test Data Retrieval: Send a FAX
Latest version: (257.4 KB)
Previous versions: View all

Appnote 1b: CD & DVD Player Tests using System One or System Two
Latest version: (2.1 MB)
Previous versions: View all

Technote 12: Creating Arbitrary Waveforms Using Time Record data
Latest version: (20.1 KB)
Previous versions: View all

Technote 1a: Generating Impedance vs. Frequency Plots with APWIN
Latest version: (113.7 KB)
Previous versions: View all

Technote 13: PC Sound Card Testing Using DSP-RIFF.exe Waveform Conversion Utility
Latest version: (481.5 KB)
Previous versions: View all

Technote 2: Generating Group Delay vs. Frequency Plots
Latest version: (59.7 KB)
Previous versions: View all

Technote 14: Testing Reduced Bit-Rate Codecs Using the System One DSP Program CODEC.dsp
Latest version: (460.5 KB)
Previous versions: View all

Technote 3: Remote Site Data Retrieval of Test Results Using Modems
Latest version: (147.2 KB)
Previous versions: View all