Hi, Android's AudioFlinger does the job of downsampling to 8khz irrespective of whatever be the top level applications sampling rate setting. AudioFlinger will down sample to 8khz and record. You may try another method of recording using arecord utility of alsa.
#alsa_arecord -f 16000 -c 2 -Dhw:0,0 test.wav In the above alsa_arecord is a soft link to alsa_aplay and -Dhw:0,0 or -Dhw:0,1 depends on ur sound card. its the capturing device. If this works fine...then something has gone wrong in android when passing audio parameters to kernel. Regards, -D Krishna Mohan On Tue, Sep 7, 2010 at 2:29 AM, dan raaka <[email protected]> wrote: > what is the build fingerprint on your device ? > > $ adb shell getprop | grep finger > -Dan > > > On Wed, Sep 1, 2010 at 12:44 PM, Steve Hugg <[email protected]>wrote: > >> Our app has a problem with AudioRecord where the recorded audio is >> very sloooow (sound like it's 2x slower). We use >> AudioRecord.getMinBufferSize to try 16000 Hz first and then back down >> to 8000 Hz if that function returns an error. So my guess is that the >> audio is reported as 8000 Hz even though it's really sampling @ 16000 >> Hz. >> >> It seems that the problem could also be that the output stream is >> stereo, not mono. We're passing AudioFormat.CHANNEL_IN_MONO on API >> levels 5 and above and AudioFormat.CHANNEL_CONFIGURATION_MONO >> (deprecated) on the earlier devices. This seems to be how it works for >> AudioTrack. But is this how it works for AudioRecord? >> >> -- >> You received this message because you are subscribed to the Google >> Groups "Android Developers" group. >> To post to this group, send email to [email protected] >> To unsubscribe from this group, send email to >> [email protected]<android-developers%[email protected]> >> For more options, visit this group at >> http://groups.google.com/group/android-developers?hl=en >> > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected]<android-developers%[email protected]> > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
