On 13-May-2004 Adam Tla/lka wrote: >> What do you want to do with the mixer? > Hmm - typically people just want to control PCM volume. > When using OSS you can just do mixer ioctl's on the opened PCM fd. > Simple and clear.
No, it's not simple, unless the driver makes it simple removing some capabilities of the card. For example the Echoaudio Mia hasn't a PCM volume control. It has a mixer that mixes 8 PCM channels into 4 physical channels. In order to change the PCM volume of one of the eight channels you have to change the levels of a whole row of the mixer. Similarly, all other Echoaudio cards don't have a line-out volume control and to change the volume of one output channel you have to change the PCM volume of that channel *and* a whole column of the monitor mixer. I guess there are some cards that are more complex than those. I exported the raw controls and I handle everything in user-space with a dedicated "console" program similar to the one shipped with the windos drivers. > So how a program could in a simple way obtain information which > control to use to set the volume level of particular stream? Good question. The current approach is based on the control names but sometimes they're not enough. What do you suggest ? -- Giuliano. ------------------------------------------------------- This SF.Net email is sponsored by: SourceForge.net Broadband Sign-up now for SourceForge Broadband and get the fastest 6.0/768 connection for only $19.95/mo for the first 3 months! http://ads.osdn.com/?ad_id=2562&alloc_id=6184&op=click _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
