Re: sample rate conversion on input
Re: sample rate conversion on input
- Subject: Re: sample rate conversion on input
- From: Nigel Redmon <email@hidden>
- Date: Mon, 12 May 2008 18:33:58 -0700
Thanks, Bill--sadly, that won't work for me--must support Tiger.
On May 12, 2008, at 2:16 PM, William Stewart wrote:
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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