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More about Impulse Response  
Type:  news Date:  Apr 14, 2016
… DUT is derived from the APx500 log-swept continuous sweep…
Testing MADI with APx500 and ASIO  
Type:  news Date:  Apr 14, 2016
… SSL MadiXtreme 64/128 and APx500 A high quality sound card…
APx500 v7.1 — Expanding the Scope of Units of Measure  
Type:  page Date:  Sep 24, 2025
Scale any input in either the native unit domain of that physical input or in Volts, FS, Pascals, or Amps.
Quick Tip 154 – CMRR (Common Mode Rejection Ratio)  
Type:  file Date:  Mar 19, 2024
… the measurement using APx500 audio test software. See…
Quick Tip 156 – Compare Encoded Bitstream  
Type:  file Date:  Mar 19, 2024
… reference) measurement in APx500 audio test software. The…
Latest Software  
Type:  page Date:  Sep 24, 2025
… as an output for the APx generator, an input for the…
APx500 Measurement Software (with .NET)  
Type:  file Date:  Apr 03, 2024
APx500 software version 8.0.4 adds new enhancements suited to a wide…
Technote 114: Measuring Phantom Power  
Type:  file Date:  Feb 26, 2024
… may instead download the APx Phantom Power Measurement…
FFT windows  
Type:  news Date:  Apr 14, 2016
… The windows provided with APx500 are detailed here: Hann …
Transfer Function MLS Prepend .wav Files  
Type:  file Date:  Feb 26, 2024
This download (zip file) contains the .wav files listed in the table below. Each file contains a short burst of a Maximum Length Sequence (MLS).  For each sample rate, the order of the MLS was
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