From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ed Wildgoose Subject: Re: rme 9632 crackling when sound > 0db Date: Tue, 13 Apr 2004 16:15:41 +0100 Sender: alsa-devel-admin@lists.sourceforge.net Message-ID: <407C041D.6040503@wildgooses.com> References: <407A5F99.4040201@wildgooses.com> <407A6A6B.2070201@wildgooses.com> <407B8AB3.2030407@idmt.fraunhofer.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from xunil.mail.wildgooses.com (xunil.mail.wildgooses.com [81.6.236.5]) by alsa.alsa-project.org (8.9.3/8.9.3/SuSE Linux 8.9.3-0.1) with ESMTP id RAA23458 for ; Tue, 13 Apr 2004 17:16:37 +0200 In-Reply-To: <407B8AB3.2030407@idmt.fraunhofer.de> Errors-To: alsa-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Joachim Deguara Cc: ALSA development List-Id: alsa-devel@alsa-project.org Joachim Deguara wrote: > 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". Hi, Thanks for the thought, but I don't see how this could be the issue? I am reading input from the HD, writing it to the card via either oss or alsa, and the output is analogue to a pre-amp and then on to an amplifier. The crackle only occurs when I use +4db as the output level, and then either find a song which clips anyway, or crank up the mixer so that the output clips. It could actually be some sort of electrical issue at the pre-amp to be fair, it's just that I don't remember it happening before? It doens't seem to be a problem if I drop the output level to the -10bdv setting for example. The main thing I would prefer to debug right now anyway is why mplayer doesn't work with this card. A cursory glance at the mplayer output code suggests that everything looks fine... Oh well, will need to break out that code and study it a bit more - most other apps are working now though Thanks Ed W ------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click