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

[Jorma R]

> 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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