Re: [alsa-devel] cmipci surround sound front-left plays on lfe
Tom Corner wrote:
On 09/10/10 09:10, Clemens Ladisch wrote:
Tom Corner wrote:
The surround sound 5.1 is playing fine except channel 0 (front-left) is playing on the woofer.
And the software's front left channel is also playing on the front left speaker? And the subwoofer channel isn't playing on any speaker?
No the subwoofer is playing correctly. The front-left is playing *only* on the subwoofer. There is no sound at all coming out of the front-left speaker.
In other words, what happens is this?
speaker output ---------------------- front L silence front R front R center center bass mix of front L + bass surround L surround L surround R surround R
What happens when you run speaker-test with 4 and 2 channels?
Regards, Clemens
I've been going around and around on this. The surround sound 5.1 is playing fine except channel 0 (front-left) is playing on the woofer. The card is a Terratec Aureon fun - CMI8738-MC6. I have gotten desperate and have tested this card in Windows and was able to get it working right there. I have been using speaker-test to to test the setup. I am using pulseaudio.
This is the summary of my results with speaker-test:
speaker-test -c 6 -D surround51 -t wav speaker output ---------------------- front L silence front R front R center center bass mix of front L + bass surround L surround L surround R surround R
speaker-test -c 4 -D surround40 -t wav ---------------------------------------------------- front L silence front R front R center silence bass mix of front L + bass rear L rear L rear R rear R
speaker-test -c 4 -t wav speaker-test -c 6 -t wav speaker -test -c 2 -t wav --------------------------------- front L silence front R front R center silence bass mix of front L + bass rear L silence rear R silence
I have removed pulseaudio again (recompiled all software with optional pulseaudio support without pulseaudio support) I should be outputting directly to alsa and the driver now.
Under pulseaudio speaker-test gives error messages when surround40 and surround51 is specified.
Thanks Tom
'Twas brillig, and Thomas Corner at 15/09/10 15:42 did gyre and gimble:
I've been going around and around on this. The surround sound 5.1 is playing fine except channel 0 (front-left) is playing on the woofer. The card is a Terratec Aureon fun - CMI8738-MC6. I have gotten desperate and have tested this card in Windows and was able to get it working right there. I have been using speaker-test to to test the setup. I am using pulseaudio.
This is the summary of my results with speaker-test:
speaker-test -c 6 -D surround51 -t wav speaker output
front L silence front R front R center center bass mix of front L + bass surround L surround L surround R surround R
Smells like something is messed up with the alsa driver. Someone in alsa-devel can probably help you best here. Could be a strange mixer setting but I doubt it.
I have removed pulseaudio again (recompiled all software with optional pulseaudio support without pulseaudio support) I should be outputting directly to alsa and the driver now.
That is massive overkill. I'd just stick with your distro's packages rather than recompiling everything and disabling PA support.
The speaker test using the names surround* etc. do not use pulseaudio anyway.
Under pulseaudio speaker-test gives error messages when surround40 and surround51 is specified.
This will only be true if pulseaudio daemon is running and has the device open. Much easier to just run speaker-test as:
pasuspender -- speaker-test -D surround51 ...
than recompiling everything :)
But ultimately it seems to be an alsa problem.
All the best
Col
I am using kernel 2.6.35 with a gentoo distribution. Is it possible that this bug has been fixed since kernel 2.6.35? Is it possible to try the latest drivers?
Thanks
Tom
On 09/15/10 17:02, Colin Guthrie wrote:
'Twas brillig, and Thomas Corner at 15/09/10 15:42 did gyre and gimble:
I've been going around and around on this. The surround sound 5.1 is playing fine except channel 0 (front-left) is playing on the woofer. The card is a Terratec Aureon fun - CMI8738-MC6. I have gotten desperate and have tested this card in Windows and was able to get it working right there. I have been using speaker-test to to test the setup. I am using pulseaudio.
This is the summary of my results with speaker-test:
speaker-test -c 6 -D surround51 -t wav speaker output
front L silence front R front R center center bass mix of front L + bass surround L surround L surround R surround R
Smells like something is messed up with the alsa driver. Someone in alsa-devel can probably help you best here. Could be a strange mixer setting but I doubt it.
I have removed pulseaudio again (recompiled all software with optional pulseaudio support without pulseaudio support) I should be outputting directly to alsa and the driver now.
That is massive overkill. I'd just stick with your distro's packages rather than recompiling everything and disabling PA support.
The speaker test using the names surround* etc. do not use pulseaudio anyway.
Under pulseaudio speaker-test gives error messages when surround40 and surround51 is specified.
This will only be true if pulseaudio daemon is running and has the device open. Much easier to just run speaker-test as:
pasuspender -- speaker-test -D surround51 ...
than recompiling everything :)
But ultimately it seems to be an alsa problem.
All the best
Col
participants (4)
-
Clemens Ladisch -
Colin Guthrie -
Thomas Corner -
Tom Corner