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Subject: [Bug 208791] USB audio playback issue
Date: Tue, 26 Jul 2016 01:07:02 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D208791

--- Comment #2 from alex@inferiorhumanorgans.com ---
With this kernel:

FreeBSD bloaty 10.3-RELEASE-p4 FreeBSD 10.3-RELEASE-p4 #0: Sat May 28 12:23=
:44
UTC 2016     root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERI=
C=20
amd64

And hw.snd.verbose=3D4

I see:

pcm3: WARNING: PCMDIR_PLAY DMA completion too fast/slow ! hwptr=3D0, old=3D0
delta=3D0 amt=3D0 ready=3D4236 free=3D0

With hw.usb.uaudio.debug=3D15

I see:

uaudio_chan_play_sync_callback: Comparing 44149 Hz :: 44100 Hz

This doesn't appear to vary, and has appeared consistent with the 10.3 kern=
els.
 The same hardware worked without fault in 9.x.  Sorry for the delay, but t=
his
machine is unsuitable for audio playback currently so I've not tried in a
while.

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