WMA sound issues on Gigabeat

[preglow]

Do these same files sound crap with dithering enabled on the Ipod too? If so, I'd love to have one of these files so I can debug the problem.

[shoe]

Do these same files sound crap with dithering enabled on the Ipod too? If so, I'd love to have one of these files so I can debug the problem.

I believe they sound bad if I enable dithering on the Ipod too.  I will check when I get home.  Here is a sample file (rename to wma file extension):
errorWmaFile (7.72 MB)

[saratoga]

Do these same files sound crap with dithering enabled on the Ipod too? If so, I'd love to have one of these files so I can debug the problem.

I believe they sound bad if I enable dithering on the Ipod too.  I will check when I get home.  Here is a sample file (rename to wma file extension):
errorWmaFile (7.72 MB)

Theres no replaygain on that file.  Did you actually scan it with foobar to add the replaygain tag?

Anyway, that file is peak normalized to 1.0, so yes, I would expect it to clip if you don't have replaygain info.  

[shoe]

No I didn't scan it with foobar to add replaygain tags.  I never used replaygain before, I don't know anything about it.  I gather the replaygain setting in RockBox only works if you have added the tag to the files previously with another program?  I can read up on it to find out what it is all about.  I'm not as worried about it anymore, since it sounds fine with dithering turned off.

[preglow]

Confirmed dithering makes it sounds bad, I'll see if I can fix it.

[saratoga]

Odd.  I tested on a loud track and couldn't reproduce it with WMA.  Any idea whats special about this file?

[preglow]

The bug is in the clipper part of the dither function, it has bugs that only occur at the high output bit depths that wma uses. Any positive clip in WMA should trigger the bug. I will commit a fix shortly, let me know it works.

[shoe]

I tested it on two albums that previously had the problem, now they sound fine either way (dither on or off).  

The response time for squashing bugs by the Rockbox development team is incredible, most of the bugs I've reported have been fixed within hours.  Big thanks to you guys!