Ville Pulkki

I have been trying to record four-channel sound with Max/msp with weird 

problems. I have three macs which do not work, and one that does.

object, make it record and stop it, I get a wav file which 

can not be opened with QuickTime or Matlab. 

The file saved with one computer opens easily. 

The problematic files can not be opened with Matlabs in any computers. 

So, the error seems to be in the file created with max/msp.

Matlab error: Data compression format (Format #65279) is not supported.

Computers which create problematic files:

G5, 2GHz DP Powermac, OS X.4, max/msp 4.3.1

I have tried different buffer lengths, overdrive on/off, different I/O / 

I have been trying to record four-channel sound with Max/msp with weird 
problems. I have three macs which do not work, and one that does. 

If I open file, route audio to 
sfrecord~ 4 
object, make it record and stop it, I get a wav file which 
can not be opened with QuickTime or Matlab. 
The file saved with one computer opens easily. 
The problematic files can not be opened with Matlabs in any computers. 
So, the error seems to be in the file created with max/msp.

Computers which create problematic files:
G4, 500 MHz DP, OS X.4, max/msp 4.5.7
G5, Imac, OS X.4, max/msp 4.5.7
G4, Ibook, 800MHz, OS X.4, max/msp 4.3.1

Computer which creates ok files:
G5, 2GHz DP Powermac,  OS X.4, max/msp 4.3.1

I have tried different buffer lengths, overdrive on/off, different I/O / 
signal buffer lengths. 

sfrecord-with-four-channels

> I get a wav file which can not be opened with QuickTime or Matlab.

I think until recently there was no standard whatsoever for multichannel 

wav files. I know there is some proposal out, which might be followed by 

With aif multichannel files are defined for ages. I just guess its a 

quicktime issue, an upgrade to a more recent quicktime might solve it 

Ville Pulkki wrote:
> I get a wav file which can not be opened with QuickTime or Matlab.

I think until recently there was no standard whatsoever for multichannel 
wav files. I know there is some proposal out, which might be followed by 
the more recent Mac.

With aif multichannel files are defined for ages. I just guess its a 
quicktime issue, an upgrade to a more recent quicktime might solve it 
also for multichannel wav files.

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         Klanggestalter
     Electronic Composition
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try to record 4 chanels in AIFF format!
it works for me!


sfrecord~ with four channels