STR 1) Visit http://mozilla.github.io/webrtc-landing/gum_test.html 2) Attempt to test audio => No audio output This appears to be a regression from bug 907817. Randell has pointed out there appears to be a rounding error in cubeb_audiounit.c line 328 the line should be: *latency_ms = (latency_range.mMinimum * 1000 + params.rate-1)/ params.rate; otherwise with small values, the latency can come out as zero, which will make audio fail.

This is the patch with the fix as suggested by Randell. On my system, the latency_range.mMinimum is 14.0, and params.rate is 16000, hence the existing code supplies latency_ms with a value of 0, whereas with the patch we get 1, and audio then works again.