Re: sample rate conversion on input
Re: sample rate conversion on input
- Subject: Re: sample rate conversion on input
- From: William Stewart <email@hidden>
- Date: Mon, 12 May 2008 14:16:58 -0700
Have a look at the aqrecord example (this will only work on Leopard or
later though)... /Developer/Examples/CoreAudio/
On May 12, 2008, at 11:07 AM, Nigel Redmon wrote:
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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