Cyril GERMAINE wrote: > I'm trying to play a stereo raw file (a blank channel, and the other > one with sound), and I'm facing a synchronization problem : the two > channels sometimes swap (left becomes right and right becomes left). > It's like it sometimes misses a sample, so the interleaved frames seem > to shift. > > It's getting less frequent when I increase FRAME_SIZE This sounds like a problem where the driver's interrupt handler does not manage to reprogram the DMA controller for the next period fast enough. > - SOC TI Davinci DM365 (ARM9 architecture) > > How can I prevent it? Is it possible? I'm just guessing, but something is interfering with the DMA interrupt, and that something probably is the interrupt of some other driver. Try playing a sine wave that is pregenerated instead of loaded from disk on the fly; this would rule out the storage driver. Regards, Clemens ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
