Thomas Charbonnel wrote:
This is the kind of information that should be submitted as a note to the alsa-docs. If you submit it then people will associate your name with the info.I asked Paul once about the matrix mixer. His answer was :<quote> first value: input source second value: output source third value: gain input source: 0-25 (physical channels), 26-51 (audio output streams) output source: 0-27 (physical channels) output channels 26 and 27 are the two line outs on the I/O box. </quote> As Michael is stating, full volume (100% in alsamixer, or full 65536 value in the matrix mixer) causes distortion. 50%, or 32786, seems to be the highest distortion-free value. I already mentioned this on the list but got no answer. I succesfully tested the matrix mixer, using both amixer and the alsa mixer api. Here's an amixer example with the values you picked above : amixer cset numid=5 26,26,32786 amixer cset numid=5 27,27,32786
Currently not one person has provided anything for the advanced multi channel devices :(
--
Patrick Shirkey - Boost Hardware Ltd.
For the discerning hardware connoisseur
Http://www.boosthardware.com
Http://www.djcj.org - The Linux Audio Users guide
========================================
Being on stage with the band in front of crowds shouting, "Get off! No! We want normal music!", I think that was more like acting than anything I've ever done.
Goldie, 8 Nov, 2002
The Scotsman
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