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Date:      Wed, 01 May 2002 18:08:08 -0700
From:      Orion Hodson <hodson@icir.org>
To:        Alfred Perlstein <bright@mu.org>
Cc:        freebsd-multimedia@freebsd.org, current@freebsd.org
Subject:   Re: fast playback with Intel 82801BA (ICH2) 
Message-ID:  <200205020108.g42188v67590@puma.icir.org>
In-Reply-To: Your message of "Wed, 01 May 2002 17:49:15 PDT." <20020502004915.GN98487@elvis.mu.org> 

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/-- Alfred Perlstein wrote:
| -current compiled today mp3s play too fast, any ideas on how to
| diagnose this?
| 
| pcm0: <Intel 82801BA (ICH2)> port 0xef00-0xef3f,0xe800-0xe8ff irq 9 at device
|  31.5 on pci0
| pcm0: measured ac97 link rate at 44061 Hz

You can set a sysctl to set the ac97 link rate.  I don't recall offhand what 
it is (hw.snd.pcm0.ac97rate?) - "sysctl -a | grep ac97" will find it.

There is a calibration test in the ich code since various mfrs do funny things 
with the clock.  I'd be interested to know what boot -v output is and what 
ac97 link rate works.  This is the second box reported failing on this 
recently.

- Orion



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