RE: [linux-audio-user] aplay, plughw, alsamixer question

-----Original Message----- From: linux-audio-user-admin(a)music.columbia.edu [mailto:linux-audio-user-admin@music.columbia.edu]On Behalf Of Mark Knecht Sent: Friday, July 25, 2003 7:42 AM To: Linux-Audio-User Subject: [linux-audio-user] aplay, plughw, alsamixer question Hi, Hi. I asked this question on Alsa-Dev yesterday, but 17 hours later got no answers. Excuse me to those that subscribe to both lists. This info is to help me do more debug work on a new HDSP 9652 driver version that I am helping to test. Should the volume levels I hear when using the command aplay -Dplughw:0 -r 44100 data/wave/seque~10.wav be controlled by alsamixer? The volumes for alsaplayer are being controlled by alsamixer, but this aplay command is not, at least right now on a new driver I'm using. Also, on a multichannel card, how do I direct the above aplay command to a specific channel? I am finding that with this new driver the audio is appearing on ALL channels on the card, even for a mono wave file. I think this is a bug, but I'm not sure. If there's an explanation fit for a simpleton like me about the difference between plughw and hw and when to use one vs. the other, please point me there so I can learn. I have read a bit on the Alsa site about plughw talking directly to the kernel, but beyond that I have not discovered any documentation yet. Thanks in advance. Cheers, Mark