I have a Razer Megalodon USB Headset that is producing extremely crackly sound in Ubuntu 13.04.
I've generated an alsainfo file to try to find out what the problem is, and it seems it's only recognizing one "PCM" channel. This is shown in alsamixer as well.
The alsainfo.txt file with most of the info I can get is here: https://dl.dropboxusercontent.com/u/48007253/alsa-info.txt.
The info given by lsusb -v
is provided here (it gets important at line 990):
https://dl.dropboxusercontent.com/u/48007253/lsusb.txt
The output of for i in $(find /proc/asound/); do echo $i:; cat $i; echo; done
, for those who are curious, is provided here: https://dl.dropboxusercontent.com/u/48007253/asound.txt
The output of pacmd list
is provided here:
https://dl.dropboxusercontent.com/u/48007253/pacmdlist.txt
I've confirmed the problem is not apparent in Windows 8.1, and it works with Plug-and-play functionality.
If I mess with the channel settings in the Ubuntu Sound Settings menu, I can occasionally get it working, but I can't get it to stay through reboots (or reconfiguring the sound menu again), and it definitely doesn't have the 7.1 surround sound.
Whether I use aplay
or mplayer
to test known good sound files, it doesn't produce discernible sound. Selecting any of the speakers in the Ubuntu Sound Settings menu does not produce any output. One thing to note is that the sound is not pure static. If I listen carefully, I can pick out occasional discernible syllables while running mplayer Still\ Alive.mp3
.
Hopefully someone with some usb-audio
/ALSA
/Pulseaudio
knowledge can help here.
(as a side note, it turns out it's a bad idea to install oss4
on an Ubuntu system. Fortunately, I've got my sound back up and running again, now. It still didn't fix anything with the headset.)
lsusb -v
(run as root) for this device.pacmd list
?pacmd list
and some more info on the audio quality. If you need any more info, I can provide it. I'm also fine with getting my hands dirty with system files and the command line if needed. I just don't know the internals of the Linux usb stack or sound system very well.