Hello again ALSA list Since it appears that my question may have been a little confusing I will clarify below. Thanks for any help you can give me.
> > Besides the RME PST card, are there other sound cards which can do > > interrupt driven data transfer to double-buffers (ie. no DMA) for > > playback? > >i'm not exactly shure, what is double-buffers... the turtle beach >pinnacle/fiji has shared memory, that can be accessed >simultanously from the pc & the sound card. Some cards/chipsets (RME PST, ESS solo1) allow one to transfer data for playback (record is similar) using a memory-mapped double-buffer. When buffer 1 has emptied its data to the DAC an interrupt is issued. An ISR then fills buffer 1 with more sound data while the buffer 2 continues to send its data to the DAC for playback. When buffer 2 is emptied it causes an interrupt and an ISR can fill it again. This goes on and on until all data is played back. In this method the transfer of the data from memory to the memory-mapped buffers is performed by the CPU. This is in contrast to DMA transfer of data where the busmaster on the sound card controls transfer of data from memory to card. So far I only know of the two cards mentioned above but there must be others that allow data tranfser in this manner. I would like to know which cards have the capablity to do this whether or not ALSA supports this method yet in their drivers. Thanks again, Love ALSA! Daniel Sheltraw _________________________________________________________________ MSN Photos is the easiest way to share and print your photos: http://photos.msn.com/support/worldwide.aspx ------------------------------------------------------- This sf.net email is sponsored by: Dice - The leading online job board for high-tech professionals. Search and apply for tech jobs today! http://seeker.dice.com/seeker.epl?rel_code=31 _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
