Proper mixer settings for music playback, or hardware fixes?

[Dylan Reilly]

Actually, ignore my response about it not working. I completely missed
the MD5 sum error. I need to read directions more closely.

The fix improves the quality immensely. There are occasions where some
slight clipping and popping still occur, however. But, I am having
trouble nailing down exactly when.

On Mon, Jul 21, 2008 at 2:45 PM, Dylan Reilly <dreilly at atariland.net> wrote:
> Just installing the ipk alone (I assume this is what you meant -- I
> have no dev environment up and running ATM) seems to not effect the
> distortion much if at all. The difference between no pulse audio and
> through pulse is still like night and day.
>
> On Mon, Jul 21, 2008 at 2:31 PM, Russell Sears <sears at cs.berkeley.edu> wrote:
>> See bug #1614
>>
>> https://docs.openmoko.org/trac/ticket/1614
>>
>> I've uploaded a patch that bypasses pulseaudio and a difficult to
>> install ipk file (sorry).  This ~ halves mediaplayer's CPU utilization.
>>
>> Can you check to see if the change fixes distortion in mediaplayer?
>>
>> -Rusty
>>
>> Dylan Reilly wrote:
>>> On Fri, Jul 18, 2008 at 02:50:18PM +0100, Al Johnson wrote:
>>>
>>>> I noticed the high-pass, but came to acceptable results using
>>>> alsamixer's bass-boost options. My main concern is with the
>>>> distortion in the mids to highs. As far as I understand, the
>>>> above mentioned postings only cover the high-pass problem.
>>>> But I certainly don't understand all the technical stuff.
>>>>
>>>> Does anyone else experience distortion?
>>>
>>> I have also noticed some heinous distortion in the mid to high range
>>> through the media player in the latest 2007.02 builds. However, it is
>>> not present under Qtopia. I experimented mixing and matching kernels
>>> between the distributionsw and 2007.02 + Qtopia kernel still has the
>>> distortion.
>>>
>>> I did some more poking around (under 2007.02) and it seems the issue
>>> is related to pulse audio. Using madplay to play straight to /dev/dsp
>>> produces no distortion but madplay through pulse audio does. I don't
>>> know much about pulse audio; does anyone have any recommendations for
>>> a work-around?
>>>
>>
>>
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>
>
>
> --
> Dylan Maxwell Reilly
>



-- 
Dylan Maxwell Reilly