> Hi, > > I have been using the RME HDSP 9652 for several months now and have > noticed a problem with the synchonisation. > > I have an external word clock which runs into 2 RME analog/digital > interfaces, as well as the HDSP itself. > > The HDSP is setup to sync to word clock input, and sample clock source > is autosync. > > The problem I am seeing is that if I transmit to 24 x 48kHz channels, > then the first 8 channels (ADAT-1) seem to continuously loose their Sync > status and I can pops (nulls) and clicks (spikes) in the recorded data > (by looping the transmit back into receive). Running hdspmixer also > shows the levels of the first 8 channels jumping around as the sync is > lost. > > Does anyone know what could be causing this problem? I have attached > information about the system that I think is relevant. > > Thanks > Ryan Winter > >
Hi Ryan, I can't see any problem with your software setup. Moreover the alsa controls you use for this are basically only wrappers to hardware registers, so I would tend to think that your problem is hardware related. What comes to my mind immediately, rather than a faulty card (though it's possible), would be a faulty cable or a problem in the WordClock chain. I suppose all the external converters you use are slaved to the same device as the card, so maybe one of those converters is defective or wired with a faulty WordClock cable or termination. What happens if you swap the converters ADAT ports ? Do you still get sync issues only on ADAT-1 ? For the pops and clicks issue, how do you loop the transmit back into the receive ? Thomas ------------------------------------------------------- This SF.Net email is sponsored by: SourceForge.net Broadband Sign-up now for SourceForge Broadband and get the fastest 6.0/768 connection for only $19.95/mo for the first 3 months! http://ads.osdn.com/?ad_id=2562&alloc_id=6184&op=click _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
