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Re: Using an AudioConverter to convert mono to stereo?

Set a channel map on the converter:

SInt32 chmap[2] = { 0, 0 };

AudioConverterSetProperty(theConverter, kAudioConverterChannelMap, sizeof(chmap), chmap);

This tells the converter that the sources for the (presumably) 2 output channels are both input channel index 0.

Doug


On Feb 8, 2005, at 12:10 PM, Simon Fraser wrote:

I have an Audio Converter hooked up via my Audio Unit's render callback
to perform on-the-fly conversions of audio sample formats and sample
frequencies. This is working fine to upsample 22.05kHz audio to 44.1kHz,
and to convert signed 16-bit ints to floats.

However, if the input is mono (mChannelsPerFrame = 1) but the requested
output is stereo (2 channels), the Audio Converter doesn't put the audio
in both channels; all the sound comes out of the left speaker.

Do I have to do something more to get sound into both channels?

Thanks for any info.
Simon
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References: 
 >Using an AudioConverter to convert mono to stereo? (From: Simon Fraser <email@hidden>)



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