Hi List I have a problem with the word clock synchronisation on my two M-Audio Delta 1010LT pci cards. The cards supply two methods for sync, a BNC connector (word clock input/output) that should sync the cards directly, and the possibility to sync them using S/PDIF. As I have understood it the BNC connectors should be connected to input on one card and output on the other and then the slave card should be set to 'Word Clock' in envy24control. No matter how I connect the BNC connectors and no matter which card I use as master envy24control reports "No Signal". The second solution, using the S/PDIF, seems to be working when looking at envy24control. The slave card correctly shows the word "locked". However, when I start recording (with Ardour) a lot of the channels read 'empty' samples (seen as the peak values '-inf' in the Ardour mixer window whereas a normally working channel has values around '-75dB') If I unload the kernel modules, wait a few seconds and reload them it seems that the state is reserved and the channels start producing non-empty samples. However it seems that the sync is not intact and the cards drift in time. I am using the 3.2.1 kernel with alsa-tools/lib/utils-1.0.25. This is my alsa information script output: http://www.alsa-project.org/db/?f=e576a52e8548695572ebe6d6e290beaa882d5e8a I sincerely hope that someone on this list can help me as I'm just about to record an musical album with my setup with this problem blocking the entire process. Kind regards Bent Bisballe Nyeng ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
