[CM] Re: 4-channel playback in clm-3 (OS X)

Jake Rundall rundall@uiuc.edu
Wed, 19 Oct 2005 12:13:58 -0500


I just wanted to say that I figured out what I was doing wrong with the 4-
channel playback in clm-3.  It turns out that dac/sndplay does indeed work with 
4-channel .aiff -- I simply didn't have my MOTU hooked up as I was testing it.  I 
was operating on the incorrect assumption that dac would play the file even if 
my computer output was not set up to do it.   I also didn' realize that dac was 
trying to let me know that this was the problem.  Anyway, everything's working 

Incidentally, I'm still interested in learning about the option of working with 
ambisonics.  So, if anyone can let me know where to go to start learning about 
this, please let me know.  Specifically, What kind of file format does 
ambisonics use? and How does one write an ambisonics file?  How does one play 
back an ambisonics file?

Thanks, and sorry for my confusion.

Jake Rundall

---- Original message ----
>Date: Tue, 18 Oct 2005 19:31:05 -0500
>From: Jake Rundall <rundall@uiuc.edu>  
>Subject: 4-channel playback in clm-3 (OS X)  
>To: cmdist@ccrma.stanford.edu
>I'm trying to create a 4-channel piece in clm-3.  I'm running CLM and using 
>openmcl in OS X.  I've used Rick Taube's vkey instrument to create 4-channel 
>.aiff files, but I'm not sure how to play them back, because dac (sndplay I 
>doesn't seem to handle this type of file.  Here are a few possible options that 
>looking for comments and suggestions on:
>1) Processing the file to create four mono sound files, one for each channel, 
>playing in another program.  Pro Tools would do it, but I'm looking for 
>something less expensive, or perhaps freeware....
>2) Working with ambisonics format... I've heard that there is a supercollider 
>patch that can play this type of format.  How does one write an ambisonics 
>Is there a specific ambisonics file format?  Would you use dlocsig to write the 
>file?  Does this work with clm-3?
>3) Any other options that I haven't mentioned?  If you have other suggestions 
>about how to work with 4-channel sound files in clm-3 (on OS X), I'd be really 
>happy to hear about them.
>Jake Rundall