sample rate conversion on input
sample rate conversion on input
- Subject: sample rate conversion on input
- From: Nigel Redmon <email@hidden>
- Date: Mon, 12 May 2008 11:07:16 -0700
I've done a bit of core audio programming, but it's been a while...
I'm working on a project I inherited; it originally used PortAudio,
but I had too many problems with it and switched to RtAudio. The only
problem there is that while PortAudio does sample rate conversion on
input and output, RtAudio only does it on output (IIRC core audio
does output conversion automatically, but input conversion requires
the programmer to attach an converter to input channels). The
application needs to run at 44.1 KHz, preferably without making the
user set his hardware to that rate, hence the need for conversion.
The application is fairly simple, in that when input is required,
only one input channel is used, and one audio audio output channel at
a time (that is, the input channel is for a calibrated mic, and one
output at a time is used for chirps and sweeps--it's a room analyzer).
So, I was hoping someone could point me in the direction of where to
look for adding a sample rate converter to a core audio input channel.
Thanks,
Nigel
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