28 May
2009
28 May
'09
3:30 p.m.
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.
Cameron.