| You can set the client format of the ext audio file to be a de-interleaved format. That means that (lets say you have a stereo file) you pass a buffer list to ExtAudioFileRead that contains 2 buffers, 1 for each channel. Then you have each channel as you read it in a separate buffer. You can then do what you like with the separate channel data.
Bill On Aug 3, 2010, at 2:07 PM, Edwards, Waverly wrote:
I am unfamiliar with a planar audio
format. I had someone offline state audio is stored in an interleaved format. I now understand how that works, as I did
not have this understanding before. I thank you very much for helping my
understanding of how the data is presented. W.
From: Jean-Daniel
Dupas [mailto:email@hidden]
Sent: Tuesday, August 03, 2010
3:13 AM
To: Edwards,
Waverly
Cc: 'email@hidden'
Subject: Re: ExtAudioFileRead
Le 3 août 2010 à 01:12, Edwards, Waverly
a écrit :
I’ve been going through the documentation and
something is not clear to me. When using
ExtAudioFileRead to read from a file into a buffer, how do
you separate the left channel from the right?
I am working to read a stereo wav file into memory but as I
read it, I am reading the file into a single buffer.
I’ve been unable to see where you would read the left
and right channels. I looked at AudioFileReadPackets
also, since I wish to read the file into memory but may not
wish to read the entire file into memory. Unfortunately,
I seem to have encountered the same issue of not being able
to see how to separate the left from the right since
there is only one buffer.
Usually, audio is stored using an interleaved format.
If you want planar audio format, you have to tell it explicitly by
setting the client stream description property of your ExtAudioFile.
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