[alsa-devel] Increasing maximum sampling frequency?

Cameron Stone camerons.lists at cse.unsw.edu.au
Thu May 28 15:30:09 CEST 2009

Daniel Mack wrote:
> On Thu, May 28, 2009 at 11:47:34AM +1000, Cameron Stone wrote:
>> I've got a USB microphone application that I want to sample at 256000 8
>> bit samples per second so I can listen to bats. I know that my device
>> can get close to that rate, but alsa seems to restrict sampling rates to
>> 192kHz.
> Just out of curiosity - which microphone and what kind of codec are you
> using for such frequencies?

I don't know which microphone but I can find out if you're interested. I
do know that its sensitivity starts at 10kHz, if that helps.

There is no codec used. I'm using Type I (uncompressed PCM) because it's
being powered by an AVR running at 16MHz and there's not enough clock
cycles to encode the samples.


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