Loopback Latency - Test loopback latency for PCM devices. Loop Test - Test loopback function for PCM devices. Higher resolution sound capture with new hardware.ĪLSA Conformance Test - A tool to verify audio drivers.ĪLSA API Test - Test basic ALSA API function.ĪLSA Helper - Get basic information for PCM devices.ĪudioFunTest - A tool to test loopback, comparing output streaming and input streaming with a special designed algorithm.ĬRAS API Test - Test basic CRAS API function.Remote control, so a host can test ports in a Device Under Test.Automatic test sequencing of multiple channels in a port.Useful for external characterization of test tool itself.Īdditional features planned for inclusion very shortly: Generation of sound without capture capture without generation.Useful when DUT is in a chamber and the monitor port is a USB dongle. Playing the captured sound buffer to a monitor port.Generation of a captured audio spectrogram file in ‘gnuplot’ format.This tool can be run on any Linux machine, not just a ChromeBook, providied the ALSA audio subsystem is available, and it usually will be. Scripts would be different for different laptop/chromebook devices as the configuration of audio inputs and outputs can be very different across different platforms. It is a command line tool which lends itself to being script driven. This could be handled by using a larger transform space and taking a little more time in processing.
More than 7 tones can be used but peak discrimination of the convolved signal becomes more difficult. During that time up to 7 sinsusoidal tones are polyphonically played, captured, Fourier analyzed, a report given and an optional spectrogram created. This test is fast- usually running in 1/2 second per port combination tested. Any missing or unexpected tones are reported. The incoming sound is convolved through a Fourier Transform and the resulting energy peaks are filtered, sorted and compared to the known expected tones. USB/audio dongles can also be tested and the audio output present in a HDMI port can likewise be tested with an appropriate dongle while looping back to an incoming microphone port.
The external Mic/Headphone jack can easily be tested but the built-in speakers and microphone can also be tested by placing the ChromeBook/Laptop in a box and arranging for the built-in speaker sound to bounce off a surface and be directed to the built-in microphone. It performs polyphonic tone synthesis while simultaneously capturing the incoming sound in some form of external audio loopback. This package intends to be a fast and powerful automated audio test tool. 3224399 cyclic_bench_test: Add script to get cyclic test result.fe5a780 audiofuntest: Add an option to save played audio file by Cheng Yueh.a0a7ca5 audiofuntest: Add an option to save recorded audio file by Cheng Yueh.d38d1e4 audiofuntest: Allows for different input/output sample rates by Gene Chang.c4f3a48 loopback_latency: Add flag for pinning capture device by Li-Yu Yu.
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