Hi Pierre-Louis, > I am not too sure I understand what you refer to as synchronization or multi- > device synchronization mechanisms. Since you mentioned you only need an > initial time, I wonder if this is conceptually related to the > start_at() functionality discussed last year for PCM? Yup, it is related to the start_at() functionality. Before start_at() playback can happen, the AXD DSP must be switched into the start_at mode. > If you have a set of implementation-defined mechanisms related to > algorithms, why not use an ALSA binary control where you define you own > syntax and content and use the alsa control layer as a 'dumb' pipe between > user and kernel. That's what everyone does for DSP control. Ah, thanks very much for that advice. This looks like a good option (looking how it's being done for filter parameters in sound/soc/intel/atom). Cheers, Tim _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel