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Bluetooth Audio Testing: A Step-by-Step Guide to Setting up the APx Bl

Type: page Date: Sep 24, 2025

For users getting familiar with the Bluetooth Duo module, here is a step-by-step guide to configure APx500 software (Bluetooth Duo requires v4.5 software or later) and pair it with your

FFT Spectrum and Spectral Densities – Same Data, Different Scaling

Type: page Date: Sep 24, 2025

Fast Fourier Transform (FFT) analysis, which converts signals from the time domain to their frequency domain equivalent, is incredibly useful in audio test.

Signal Generator Regulation in APx500 Audio Analyzers – Part 1: Auto-S

Type: page Date: Sep 24, 2025

Auto-Set Gen Level feature - One of the main regulation tools in the APx500 software

Running an External Program from APx500

Type: news Date: Apr 14, 2016

… that can be invoked by the command line, the process can easily be automated. In the example shown in Figure 2, we are using a third party program called Goldwave to play a .wav file containing an audio…

Scale Factors for Wave Files Recorded with Measurement Recorder from Analog Inputs

Type: news Date: Apr 14, 2016

… recordings, the generator was set to generate a 1 kHz sine wave at -20.0 dBV (100 mVrms). Figure 1 shows the RMS Level results from analyzing these five .wav files with the Input Connector set to File (Analog…

AP Applied: APx Automation with LabVIEW

Type: file Date: Mar 15, 2024

… or automated production environment. Examples using the APx LabVIEW virtual instrument driver are shown.

Technote 116: Testing Smartphones and Tablets

Type: file Date: Feb 26, 2024

…Smartphones and tablets provide many ways to route audio. This technote shows you how to make connections and test the sound quality for a variety of these signal paths. Where possible, we will use file-based test…

Measuring PSRR with AP2700

Type: news Date: Apr 14, 2016

… which is discussed in Technote 106: Measuring Power Supply Rejection Ratio (PSRR). The graph below shows PSRR versus frequency for a class D amplifier used in mobile devices, with appended traces for…

Sample_Calibration_Certificate.pdf

Type: file Date: Apr 23, 2026

… data collected after the instrument is adjusted and/or repaired. As Received & Shipped—Calibration data shows all tests are within specification; no adjustment or repair performed. As Shipped, New—This is a new…

APx555 Installation Instructions and Specifications

Type: file Date: Jun 26, 2026

This booklet contains safety information, installation instructions and full specifications for the Audio Precision APx555 audio analyzer.