Date: Fri, 07 Jun 2002 00:05:21 -0400 From: arlankfo@141.com To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/38967: 4/22/02 pcm driver merge appears to break several audio apps. Message-ID: <200206062206734.SM02244@141.com>
next in thread | raw e-mail | index | archive | help
>Number: 38967
>Category: kern
>Synopsis: 4/22/02 pcm driver merge appears to break several audio apps.
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Jun 06 21:10:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: Andrew Lankford
>Release: FreeBSD 4.6-RC i386
>Organization:
none
>Environment:
System: FreeBSD bogushost2 4.6-RC FreeBSD 4.6-RC #6: Thu May 30 20:53:59 EDT 2002 root@bogushost2:/usr/obj/usr/src/sys/ARL0402 i386
Excerpts from bootup:
Preloaded elf module "snd_es137x.ko" at 0xc12181dc.
Preloaded elf module "snd_pcm.ko" at 0xc1218280.
...
pcm0: <Creative CT5880-C> port 0xd000-0xd03f irq 5 at device 14.0 on pci1
...
pcm0:play:0: play interrupt timeout, channel dead
(In case it isn't obvious, my sound card is an Ensoniq AudioPCI, Model ES4815)
For the record, two of the offending audio player ports, waveplay
and wavplay, don't appear to have undergone many changes or updates
for at least 6 months.
>Description:
Playing 8 bit mono (1 channel) .wav files using waveplay,
wavplay, or play(1) from the sox package will produce a
quick succession of clicking noises at 11025 hz and 22050
hz sampling. This can either last about a second before
the program exits normally, or (using waveplay) it can go
on seemingly forever. Occasionally the kernel will produce
the "pcm0:play:0: play interrupt timeout, channel dead".
I've only encountered this problem so far with clean
monophonic wav files that use those two (common) sampling
rates, but stereo and/or 16 bit samples play ok. Other
audio applications that don't play normal sample files seem
to work ok--of course, most of those apps use stereo sound.
I first noticed the problem after I updated to STABLE on
May 2 (shortly after new pcm code was merged from current).
Subsequent make buildkernels appear to have reduced the number
of "play interrupt timeout, channel dead" messages, but
that's all.
>How-To-Repeat:
waveplay monowavefile.wav
wavplay monowavefile.wav
play monowavefile.wav
...provided that monowavefile.wav is 8 bits, mono, and
either 11025 hz or 22050 hz. Ones that were sampled at
6000, 8000, 8012, 11000, 16000, 22000, or 44100 to start
with work ok.
>Fix:
glad you asked.
With wavplay and play, if you specify the playback sampling
rate explicitly (with an -s | -r command line option)
to be something like 11000 hz instead of the (standard?)
11025 hz or 22000 hz instead of 22050 hz, the sample will
sound ok. Higher/lower values will either produce the crackling noise
or a slowed-down/sped-up sound as one might expect. With waveplay,
tweaking the playback rate will often give you a very loud (but
thankfully very brief) highly sped-up playback.
>Release-Note:
>Audit-Trail:
>Unformatted:
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-bugs" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200206062206734.SM02244>