Re: Using an AudioConverter to convert mono to stereo?
Re: Using an AudioConverter to convert mono to stereo?
- Subject: Re: Using an AudioConverter to convert mono to stereo?
- From: Doug Wyatt <email@hidden>
- Date: Tue, 8 Feb 2005 12:31:47 -0800
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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