Hi, I am trying to write an alsa driver for my audiowerk8 soundcard. The aw8 uses a Philips saa7146 chipset. There are 2 capture and 8 playback channels mapped on the saa7146's DMA as follows: DMA1: 2xcapture DMA2: 4xplayback DMA3: 4xplayback Sample format is 16bit. Frame format is as follows: (A number corresponds to a channel, a stereo channel-pair is embraced by [] and 1 digit corresponds to one sample byte) capture channels [0,1] on DMA1: 00--11-- playback channels [2,3],[4,5] on DMA2: 22443355 playback channels [6,7],[8,9] on DMA3: 66887799 I guess this is interleaved format. Since I don't really understand the relation between DMA, substreams, frames and channels I wonder how a alsa substreams map best to this configuration: 1) 1 substream per DMA -> can alsa handle frames with more than 2 channels, and if yes, how? 2) 1 substream per stereo channel-pair 3) 1 substream per channel Regards, Matthias ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-devel
