recording from firewire interfaces on MacOS?

recording from firewire interfaces on MacOS?

[Michael Dunston]

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Does anyone have any experience using SoX to record from firewire 
interfaces on MacOS X?  Searching the archives for “firewire” 
resulted in one post which mentioned a similar issue to what I am 
experiencing, however this post was from 2011 and there didn’t seem to 
be any resolution to the problem.  In this case I have a Mobile I/O 2882 
set as the system audio interface on a MacOS 10.12.6 system with 
sox-14.4.2, and although the interface has 18 inputs (with two channels 
enabled for sending audio to DAWs via coreaudio, which do show up in 
both Logic and ProTools), SoX only appears to see it as a 1-channel 
interface and at 32 bits (instead of 24) as other hosts see it:

	Input File     : 'default' (coreaudio)
	Channels       : 1
	Sample Rate    : 44100
	Precision      : 32-bit
	Sample Encoding: 32-bit Signed Integer PCM

And attempting to record a stereo file from this results in an error of 
“WARN formats: can't set 2 channels; using 1” and a file only 
containing clicks and silence.  I’ve tried setting the firewire 
interface as the system-default input device in the system preferences 
as well as naming it specifically using the “ −t coreaudio “ 
option (as found in Output and Input tabs of the System 
Preferences->Sound menu), but not yet had any success.  Based on the 
list archives it doesn’t seem like firewire interfaces are commonly 
used with SoX, but any suggestions would be appreciated.  Thanks in 
advance for any advice on where to look next.

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