Date: Mon, 25 Oct 2004 00:08:46 GMT From: Jim Durham <durham@w2xo.pgh.pa.us> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/73098: Scan rate of sound card shifts when vchans > 0 . Message-ID: <200410250008.i9P08ktN060130@www.freebsd.org> Resent-Message-ID: <200410250010.i9P0AFCY083841@freefall.freebsd.org>
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>Number: 73098 >Category: kern >Synopsis: Scan rate of sound card shifts when vchans > 0 . >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Mon Oct 25 00:10:15 GMT 2004 >Closed-Date: >Last-Modified: >Originator: Jim Durham >Release: 5.2.1-RELEASE >Organization: >Environment: FreeBSD localhost 5.2.1-RELEASE-p9 FreeBSD 5.2.1-RELEASE-p9 #2: Mon Aug 30 17:45:57 EDT 2004 root@localhost:/usr/obj/usr/src/sys/JIMSLAPTOP i386 >Description: When you set hw.snd.pcm0.vchans greater than 0, the pitch of the played back sound changes about 8%. This is probably the difference between the native 48khz scan rate of the sound card and the 44.1khz scan rate needed to play the wav file or mp3 file. >How-To-Repeat: sysctl hw.snd.pcm0.vchans=4 >Fix: Workaround set sysctl hw.snd.pcm0.vchans=0. Some time back, I discovered this about the time of 5.0 or 5.1 RELEASE and I worked with someone from the development team who apparently fixed the problem and committed the fix. However, I lost my old sent-mail file and I can't remember who it was. I just discovered recently that the problem is apparently back. >Release-Note: >Audit-Trail: >Unformatted:
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