[linux-audio-user] Ardour in linux Journal....AGAIN...

Jamie Guinan guinan at bluebutton.com
Sun Feb 6 16:46:12 EST 2005


On Fri, 4 Feb 2005, Jamie Guinan wrote:

> On Fri, 4 Feb 2005, Florin Andrei wrote:
> 
> > On Fri, 2005-02-04 at 11:41 -0500, Jamie Guinan wrote:
> > 
> > > As I understand it, the 4 analog inputs + 2 SPDIF inputs divide into 2 
> > > channels (left/right) each, so you could record 12 tracks at once.  But 
> > > you could also think of it as 6 channels with left/right pan on each.
> > 
> > No.
> > One input = one channel. Don't confuse balanced with stereo.
> 
> Right.
> 
> And each input (4 analog, 2 digital) can be sent independently to the L/R 
> channels in the digital mix.  So I thought it would be possible to record 
> 12 channels of audio, each pair containing a L/R mix of the 6 total 
> inputs, as in,
> 
>  $ arecord  -c 12 -f S32_LE -r 48000 -D hw:1 output.wav

Ok, please excuse my confusion, I think I finally get it. Jan's post 
cleared it up for me.

Fwiw, I tried that arecord command, pluged a live signal into
each of the 4 inputs one at a time on my Delta66 breakout box, 
and examined the output in "sweep", it looked something like this,

 1  --/\/\/\/\/\/-----------------------------------------------
 2  -----------------/\/\/\/\/\/--------------------------------
 3  --------------------------------/\/\/\/\/\/-----------------
 4  ---------------------------------------------/\/\/\/\/\/----
 5  ------------------------------------------------------------
 6  ------------------------------------------------------------
 7  ------------------------------------------------------------
 8  ------------------------------------------------------------
 9  ------------------------------------------------------------  *
10  ------------------------------------------------------------  *
D1  --/\/\/\/\/\/---------------------/\/\/\/\/\/--------------- (dmix)
D2   -----------------/\/\/\/\/\/----------------/\/\/\/\/\/---- (dmix)


So the ice1712 has 4 unused inputs on the Delta66.  Oh, well,
its only silicon.  :)

-Jamie

* (I don't have SPDIF inputs to test).


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