Re: [linux-audio-user] Quattro USB (EMI 6|2m) - Linux-audio-user

3 May 2004

...
  Jorma R wrote:
  What I haven't figured out is how to make the
EMI capture at 6*24/44100
 and playback at 2*16/44100 which would be the maximum performance by
 this box.  
 Jack always tries to use the same sample format for both playback and
 capture.

 Try this:

 pcm.emi62 {
 	type hw
 	card 0    # or whatever it is
 }

 pcm.emi_all_24 {
 	type asym
 	playback.pcm {
 		type linear
 		slave {
 			pcm emi62
 			format S16_LE
 		}
 	}
 	capture.pcm emi62
 }

 ctl.emi_all_24 {
 	type hw
 	card 0
 }

 HTH
 Clemens

Thaks for this Clemens - I could not figure the suntax out myself. This 
got me further but unfortunately did not entirely resolve the problem.

Now I do get 24-bit capture and 16-bit playback. But only with 2 
channels of each. :) If I do not set the -i 2 switch for Jack I get only 
silence in the output ports.

With 2 i/o channels I get the correct bit depths for both so the 
configuration above seems to be right. The rest may well be 
emi-spesific.

I'll keep experimenting.

-Jorma

__
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