From: Dien Nguyen <[email protected]> Reply-To: "[email protected]" <[email protected]> Date: Sunday, November 30, 2014 at 7:14 PM To: "[email protected]" <[email protected]> Subject: [beagleboard] Audio capture issue with BeagleBone Black and Audio Cape Rev B
> > Hi All, > > We tried the Audio Cape Rev B with BeagleBone Black. The kernel version is > 3.14.17 (https://github.com/RobertCNelson/bb-kernel.git branch am33x-v3.14) > > We was able to play and record via the Audio Cape. If we record and play the > file via the Audio Cape, it works fine. But when we move the recorded file to > other machine or play it via the USB Sound Card, the speed of the recorded > file seems 1.5 time slower than it really is. > > On the board, we recorded the audio with > arecord -t raw -f S16_LE -r 44100 /tmp/1.raw > > Then, we playback the file with command > aplay -t raw -f S16_LE -r 44100 /tmp/1.raw > > 1/ On x86 machine, the voice become very slow. If we change the sampling rate > to 63000, it is played close to the real voice we recorded. > 2/ Trying with a USB Sound Card plugged directly to the board. > aplay -t raw -f S16_LE -r 44100 -D plughw:1,0 /tmp/1.raw > We saw the same issue as seen on x86 machine > > It seems that there is something wrong with the sampling rate clock. May > anyone please give some suggestions I¹ve seen the same problem when recording on the BBB and then playing the same file on my Ubuntu Desktop. Not sure why this happens. I¹m using 3.15.10-bone8. Regards, John > > Thanks > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
