From: Joachim Deguara <dga@idmt.fraunhofer.de>
To: Ed Wildgoose <lists@wildgooses.com>
Cc: ALSA development <alsa-devel@alsa-project.org>
Subject: Re: rme 9632 crackling when sound > 0db
Date: Tue, 13 Apr 2004 08:37:39 +0200 [thread overview]
Message-ID: <407B8AB3.2030407@idmt.fraunhofer.de> (raw)
In-Reply-To: <407A6A6B.2070201@wildgooses.com>
The good news: you don't have a driver problem! But it sounds like you
have a Wordclock problem. Namely, your rme 9632 has a different clock
than your playback device (D/A) and they are not in Sync. Check the
setting for who is (and should be) Wordclock Master and take adjust
accordingly. You can set the mode of synchronisation for you card by
editing /etc/asound.state and the running "alsactl restore".
-joachim
Ed Wildgoose wrote:
>
>>
>> You can also simulate this simply by turning up the mixer controls so
>> that normal music starts to clip. Same effect.
>
>
>
>
> At risk of creating noise. Further experimentation shows that you need
> to set the output levels to +4db in hdspconf for this crackling to
> occur. So in fairness this could really be an overdriven output...?
>
> The -10dbv output level is significantly quieter than any other
> equipment that I own (I know it's what they call consumer output device
> level, but still...)
>
> Ed W
>
>
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--
Joachim Deguara Email: dga@idmt.fraunhofer.de
Fraunhofer IDMT, Langewiesener St. 22, 98693 Ilmenau, Germany
Phone: +49 3677/69-4851 Fax: +49 3677/69-4399
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next prev parent reply other threads:[~2004-04-13 6:37 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-12 9:21 rme 9632 crackling when sound > 0db Ed Wildgoose
2004-04-12 10:07 ` Ed Wildgoose
2004-04-13 6:37 ` Joachim Deguara [this message]
2004-04-13 15:15 ` Ed Wildgoose
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