Re: [sc-users] Read single channel of external file into buffer

[Joshua Parmenter <joshp@xxxxxxxxxxxxxxxx>]

However, there may not be a standard file format for soundfiles... so  
perhaps this tricky.

Anyone know?

Josh

******************************************
Joshua Parmenter
joshp@xxxxxxxxxxxxxxxx
Post-Doctoral Research Associate - Center for Digital Arts and  
Experimental Media
Raitt Hall - University of Washington
Seattle, Washington 98195

http://www.dxarts.washington.edu
http://www.realizedsound.net/josh/


On Jun 5, 2006, at 9:10 PM, Joshua Parmenter wrote:

> I wonder how hard it would be to add an argument to b_allocRead for  
> number of channels and which one to read? nil, nil - read all (what  
> it does now), otherwise - check header for number of channels and  
> read the appropriate values... has anyone else ever constructed OSC  
> messages? Or perhaps a new message? b_allocReadChannel?
>
> I'll take a look at the source, maybe this is possible?
>
> Josh
>
> ******************************************
> Joshua Parmenter
> joshp@xxxxxxxxxxxxxxxx
> Post-Doctoral Research Associate - Center for Digital Arts and  
> Experimental Media
> Raitt Hall - University of Washington
> Seattle, Washington 98195
>
> http://www.dxarts.washington.edu
> http://www.realizedsound.net/josh/
>
>
> On Jun 5, 2006, at 8:26 PM, blackrain wrote:
>
> > Totally right James, I missed the last part of the message.
> > All the synthdefs in the examples I sent fan BufRd's out. however you
> > can add an argument, like you mention, to grab one channel or even  
> > mix
> > them down.
> >
> > cheers,
> >
> > x
> >
> > On 6/5/06, James Harkins <jamshark70@xxxxxxxxx> wrote:
> > > On Jun 5, 2006, at 9:43 PM, blackrain wrote:
> > >
> > > Hi Axel,
> > > These are two approaches; The first one uses  several predefined
> > > synthdefs - as many as the number of channels you want to deal with.
> > > The second approach generates the synthdef accordingly to the number
> > > of channels needed.
> > > I have added a couple of ideas of how to load soundfiles into a
> > > buffers array as well.
> > >
> > > From BufRd help:
> > >
> > >  warning: if you supply a bufnum of a buffer that has a different
> > >  numChannels then [sic] you have specified to the BufRd, it will
> > >  fail silently.
> > >
> > > I thought Axel was asking how to play only one channel out of a  
> > > multichannel
> > > sound file. So if you have a stereo file and do BufRd.ar(1, ...),  
> > > you'll get
> > > no sound.
> > >
> > > At present there is no easy way to load a pre selected channel of  
> > > a sound
> > > file. However you can use PlayBuf or BufRd to play back all the  
> > > channels,
> > > and choose only the channel you need for the output.
> > >
> > > stereoSig = BufRd.ar(2, ...);
> > > Out.ar(outbus, stereoSig[0])  // play only the left channel
> > >
> > > hjh
> > >
> > >
> > >
> > > : H. James Harkins
> > >
> > > : jamshark70@xxxxxxxxxxxxxxxxx
> > >
> > > : http://www.dewdrop-world.net
> > >
> > > .::!:.:.......:.::........:..!.::.::...:..:...:.:.:.:..:
> > >
> > >
> > >
> > >
> > > "Come said the Muse,
> > >
> > > Sing me a song no poet has yet chanted,
> > >
> > > Sing me the universal."  -- Whitman
> > >
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