Ubuntu 7.04 (Linux Mint 3.0)
alsa-base 1.0.13-3ubuntu1
alsa-utils 1.0.13-1ubuntu5
I have an Asus M2N-E motherboard with integrated HDA Nvidia (AD1988B).
By default stereo is upmixed in a strange way to 5.1 and I haven't found a way to disable that behavior.
>speaker-test -c2
expected: noise is coming from left speaker, then from right, again left and so on
what i get: rear is duplicated with front, center duplicated with left front, lfe duplicated with right front
The same behavior is taking place when playing music using amarok-xine for example.
Sound devices config in amarok-xine and speaker arrangement setting doesn't have any effect (I really want stereo 2.1 mode).
>speaker-test -c2 -D surround51
works just fine
Debugging info is in following posts.
>asoundconf list
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Names of available sound cards:
NVidia
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I have no ~/.asoundrc or /etc/asound.conf.