Re: [ecasound] Multitrack recording with Midiman Delta 44

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Subject: Re: [ecasound] Multitrack recording with Midiman Delta 44
From: Kai Vehmanen (k@eca.cx)
Date: Sat Sep 02 2000 - 12:52:55 EEST

On Fri, 1 Sep 2000, Joshua Horvath wrote:

>> inputs and 10 outputs. The point is that you have to specify the exact
>> channel count supported by your hardware. This is a ALSA 0.5.x feature. So
> Yep, 12 is the magic number. Recording works fine. Now, my last question for today
> is can I write out a four channel wav instead of a 12 channel wav? I could separate

Actually this is easy...

ecasound -f:32,12,44100 -i alsa,1,0 -f:32,4,44100 -o 4ch-file.wav

Here, the default chain has 12 channels. In fact, chain channel count
is always max(input-ch-count,output-ch-count). Without -erc and -erm
effects, input-ch-n is always copied to chain-ch-n, and eventually to
output-ch-n. If input has fewer channels than the chain, then those
chain channels will contain silence. Similarly, if chain has more channels
than the output object, extra channels are ignored during output phase.

> The -erc stuff only seems useful for post-processing... or can it be used real-time
> as well?

No problem, you can use it during normal processing. 

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