[LAD] a little help with mutichannel alsa

BODY { font-family:Arial, Helvetica, sans-serif;font-size:12px; First, what I would like to do is pick which channel I send audio to on the RME 9632 card. My RME card is device 0. When I call this function: snd_pcm_open(&handle,device,SND_PCM_STREAM_PLAYBACK,0) And set device = plughw:0,0 I get playback across all the RME outputs. (Just using hw:0,0 without the "plug" prefix does not work for some reason which may or may not matter.) So, how do I access the subdevices/channels? When I run aplay -l I only see 1/1 subdevices. Shouldn't I be able to set my device to hw:0,0,1 or plughw:0,0,1 to access channel 2, for example? There's no .asoundrc. Do I need it for this? Finally, when attempting multichannel alsa, I assume I need to simply make an array of pointers to the same datatype as "handle" and run through initializing each handle separately. In the first time thought the loop, I can get handle[0] and all its parameters to initialize without errors. When I try to initialize handle[1] on a new device such as plughw:0,0,1 I get an error that the device or resource is busy. I feel like I've hit a brick wall here. Perhaps I am out of my league. But, it feels tantilizingly close to working. Thanks guys/gals!! Grekim