On Wednesday 05 April 2006 09:45, Robert Reif wrote: > One problem that I am seeing is that there is no practical way to > guarantee synchronization between the sound card hardware and the > sound card thread. OSS doesn't support poll/select reliably in > all drivers and the esd driver just writes to a socket. We try to > synchronize to the hardware by using a one-shot timer set to the > expected processing time calculated from the sound card data > format. The problem I see in the esd driver is that we set a > timeout to poll of for example 12 ms but what we really get is > is a 20 ms sleep. We compensate for this by sending as much > data as we can. Using virtualized hardware like alsa dmix just > removes us even further from the hardware we would like to > synchronize to by blocking.
Apart from legacy, is there a reason you haven't moved en-masse to alsa? It is the only supported driver in current kernels now. Talking to oss, the oss compatibility module or worse through a sound driver like esd, arts, gstreamer, jack... etc just adds more potential for desynchronisation. Cheers, Con
