Crackling sound from usb sound device
Hi,
I have been using an external dac over usb for some months. Since about
two weeks sometimes sound is distorted (irregualar crackles, which
usually diappear after closing and reopening the application, i.e. mpd,
xine, rhythmbox or a stream from firefox, some times).
I am under the impression that this happens since a kernel upgrade a
week ago.
The message "cannot get freq at ep 0x1" appeared in the logs before.
Where does it come from and what does it mean?
Any ideas?
Thanks
Klaus
root@x200:~# cat /etc/debian_version
7.0
---
[UPGRADE] linux-image-3.2.0-4-amd64:amd64 3.2.35-2 -> 3.2.39-2
Log complete.
Aptitude 0.6.8.2: log report
Thu, Mar 14 2013 16:46:14 +0100
----
[ 165.287224] usb 1-5.4: New USB device found, idVendor=0451,
idProduct=adac
[ 165.287233] usb 1-5.4: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[ 165.287240] usb 1-5.4: Product: Audiolab M-DAC
[ 165.287245] usb 1-5.4: Manufacturer: Lakewest Audio
[ 165.295131] input: Lakewest Audio Audiolab M-DAC as
/devices/pci0000:00/0000:00:1a.7/usb1/1-5/1-5.4/1-5.4:1.0/input/input13
[ 165.296463] generic-usb 0003:0451:ADAC.0003: input,hiddev0,hidraw2:
USB HID v1.11 Device [Lakewest Audio Audiolab M-DAC] on
usb-0000:00:1a.7-5.4/input0
[ 165.368060] 7:2:1: cannot get freq at ep 0x1
[ 165.380535] usbcore: registered new interface driver snd-usb-audio
[ 194.468488] 7:2:1: cannot get freq at ep 0x1
Reply to: