Testbat: a shell toolkit for BAT(Basic Audio Tester) utils.
BAT is a small util for audio driver automated testing. The latest features and wiki are on www://github.com/01org/bat. The repo is also available on git://git.alsa-project.org/alsa-utils.git.
featuretest.sh basic test for BAT features, like playback, capture, frequency detecting, RIFF WAV file generating, etc.
soundpathtest.sh BAT frequency detecting stress test on DP/HDMI/headphone/line-out to microphone/line-in loopback.
quicktest.sh BAT frequency detecting test. It is optimized against one frequency so much faster than regular frequency detecting.