Mailinglist Archive: opensuse-bugs (19817 mails)

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https://bugzilla.novell.com/show_bug.cgi?id=390473

User cymerio@xxxxxxxxx added comment
https://bugzilla.novell.com/show_bug.cgi?id=390473#c13


asd asd <cymerio@xxxxxxxxx> changed:

           What    |Removed                                         |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                                        |NEW
      Info Provider|cymerio@xxxxxxxxx                               |




--- Comment #13 from asd asd <cymerio@xxxxxxxxx>  2008-05-20 19:11:33 MST ---
Yes, the workaround still works.

Everything works the same as the comment #6. As the comment #6 says, WITHOUT
the hack the only command that worked was that one with "plughw:0". 
Alsa-info output is attached.



I do not know much about ALSA, but if I understand correctly the output of the
aplay command, the sound always reaches the hardware in 32 bit, except when I
try to play a <=16 bit wave through the "plughw:0" device. Then the format is
S16_LE and it sounds good. In all the other cases, the sound reaches the
hardware in S32_LE format and I get noisy output. The alsa-info script only
mentions 16 and 24 bits, so I think 32 bits is not supported and that's why I
get noisy output. ¿Am I correct?



== To summarize ==
S32_LE at the end of the chain = noisy output
S16_LE at the end of the chain = GOOD

WITHOUT the hack:
"plug:dmix" and "default" = 8,16,24 bit converted to S32_LE
"plughw:0"                = 8,16 bit converted to S16_LE
"plughw:0"                = 24 bit converted to S32_LE

WITH the hack:
"plug:dmix" and "default" = 8,16,24 bit converted to S16_LE
"plughw:0"                = 8,16 bit converted to S16_LE
"plughw:0"                = 24 bit converted to S32_LE

Kernel change makes no difference.
===================


I tried the same commands on another PC (another sound driver) with OpenSuSE
10.3 and all the waves got converted to S16_LE somewhere.





I tried using the "--disable-format" option with "plug:dmix" and "default" and
got the error:
   aplay: set_params:954: Sample format not available

But with "plughw:0" played just fine (16 bit wave).


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