[Expired for alsa-driver (Ubuntu) because there has been no activity for
60 days.]
** Changed in: alsa-driver (Ubuntu)
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1192458
Title:
[USB-Audio, playback] 4-channel mode don't work on E-MU 0204 USB
Status in alsa-driver package in Ubuntu:
Expired
Bug description:
On E-MU 0204 USB only 2-channel mode worked. In this mode the second
pair of channels just duplicates the output of the first pair. E-MU
control panel under MS Windows allow to switch to 2-channel or
4-channel mode. I ran USB sniffer, and it shows switch commands that
the system send to the device:
======================================
Host send 2 bytes to device:
Request: 0x1
Value: 0x400
Data: 01 01 //switching to 2-channel mode
Data: 01 02 //switching to 4-channel mode
======================================
Looks like in Ubuntu the card by default stay in 2-channel mode.
Switching to 4-channel mode apparently can be added to quirks.c
DistroRelease: Ubuntu 12.10
Package: alsa-base 1.0.25+dfsg-0ubuntu4
Uname: Linux 3.9.6-030906-generic x86_64
Architecture: amd64
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