I think this problem is related to what I mailed about a week ago (no reply). An HDSP master/slave sync problem in current CVS. Thus you are not alone with this type of problem.
On Tuesday 07 October 2003 00.55, Mark Knecht wrote: > Hi, > I have a pretty frustrating problem with my Alsa setup. Right now > I'm just looking for guidance about what's messed up and how I might > get it fixed. I'm not sure if it's a driver issue, an Alsa issue, or > a hardware issue. I have not yet found anyone else that has this > exact set of problems, but no one uses the same hardware either. > > At the outset, let me say that the machine is dual boot and the > problem does not occur in Windows. > > MY SYSTEM - HDSP 9652, Gentoo-2.4.20-r7, Alsa 0.9.6 patched with > Thomas's HDSP patches from 8/27. ADAT1 out goes to an Alesis AI-3 > D/A. > > PROBLEM STATEMENT- When playing mp3's using mpg123 I get a horrible, > loud and ugly high pitched static noise just before the audio starts > to play. It lasts about 1 second. I have also noticed that using > hdspconf to change the sample clock rate to 48K from 44.1K causes the > same horrible noise, but usually for a shorter period of time. > > One thing I've noticed by watching hdspconf is that when I start > playing the mp3 that hdspconf first says it loses sync, then goes to > a lock condition, and then goes back to a sync condition when the > noise stops. Also the sample frequency changes first to 32KHz and > then back to 44.1K and then becomes synced again. This happens while > the noise is occurring. > > My speakers and headphones are driven from an AI-3 converter > hooked to to the ADAT1 port of the HDSP 9652. The AI-3 is ADAT, based > but runs at 48K unless it receives a input clock of a different > frequency. The 9652 is set up to generate 44.1K as the master device, > and the AI-3 seems to track it except when this noise occurs. > > One last thing. If I set my HDSP 9652 to 48KHz and attempt to play > and mp3, then the noise occurs, the frequency drops first to 32K And > then goes to 44.1K. The mp3 plays, but the card is left at 44.1K And > never goes back to 48K. Does this sound correct? > > I've tried all sorts of different clocking schemes but none of > them seem to solve this problem. > > I'm hoping that someone in the Alsa-Dev group will know something > about this and how I might fix it. If you want more technical data or > have some test you think I should try please let me know. > > Thanks in advance, > Mark > > > > ------------------------------------------------------- > This sf.net email is sponsored by:ThinkGeek > Welcome to geek heaven. > http://thinkgeek.com/sf > _______________________________________________ > Alsa-devel mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/alsa-devel ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
