On 09/28/2012 01:23 PM, Gabriel M. Beddingfield wrote:
On 09/28/2012 06:00 AM, David Henningsson wrote:
(Oh, and btw, if you have an idea of the crackling/distorted USB audio, let me know. I'm using a standard Logitech USB Headset, using speaker-test -c 2 -D plughw:Headset -t sine -r 48000 I can make the problem go away using any of these options:
- Booting a 3.2 kernel - I've tried 3.5, 3.6-rc7 and 3.2
- Choosing the 44100 sample rate instead of the default of 48000
- Selecting the outer USB port instead of the inner one. Yes, there
are two USB ports next to each other, and this only happens on one of them. (!))
The last statement sounds like you're sharing a hub with another device that has reserved bandwidth. For example, a USB webcam will often do this. Audio will work for a while and then get pre-empted.
Use 'lsusb -t' to view your USB layout.
Thanks! Indeed, when deactivating bluetooth (in both kernel 3.2 and 3.5) the sound is back to normal, so this time I could actually get the distortion out of 3.2 as well.
Question is - is this an actual hardware limitation, or is it actually fixable if we wrote better drivers?