Audio Precision app works with latest versions of Android
Audio Precision has updated its Android audio test app to include support for versions 4, 5 and 6 of the operating system, as well as the latest release, Android Nougat (7.0). The app works with the audio testing manufacturer’s APx audio measurement software to provide an automated evaluation of smart phones and tablets. Alongside the release the company has also announced a trio of measurement plugins for its ApX software (version 4.3 or later).
The app fully integrates with APx offering developers the ability to complete audio testing on mobile devices from component development through to the product design and evaluation processes. Support is delivered for analogue testing of a device’s TRRS jack microphone input as well as the headphone output. Bluetooth sound measurement, such as A2DP (Advanced Audio Distribution Profile) downlink and uplink testing and HFP (hands-free profile) testing, is also catered for. Audio Precision notes that ‘no phone call is required for Bluetooth HFP evaluation’ and that ‘the HFP device under test (DUT) does not even require a SIM card’.
The app can be downloaded by registered users of Audio Precision’s website and requires an APx500 Series analyser with a Bluetooth hardware option. Supported by APx500 audio measurement software version 4.2 and higher, the download includes the essential Android applications, the app’s installer, APx project files, audio waveform files and 50 pages of technical documentation.
The three new plugins reportedly add new capabilities while allowing users to take advantage of built-in APx features such as limits, sequencer control, derived results and reporting. The Attack-and-Release plugin provides automatic gain control (AGC) to limit dynamic range in applications ranging form hearing aids to broadcasting, while allowing users to perform 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 reportedly be customised when using the IEC 60268-8-based measurement.
With the Octave Analysis plugin, users can perform fractional octave analysis of broadband signals incorporating speech and noise, an important element in the design and verification of audio and communications systems. The plugin integrates octave analysis capabilities into APx measurement software, replacing the FFT-to-Octave Conversion utility for APx version 4.3 users.
Lastly, the A/V sync plugin integrates audio delay measurement into APx software to support the evaluation of audio/video timing (lip sync) in professional and consumer systems. The plugin also supports the A/V synchronisation tests part of both Dolby and DTS licensee compliance requirements.