FS#11684 - Ogg Vorbis playback is broken on Sansa e200v2

Attached to Project: Rockbox
Opened by Doru Barbu (fragilematter) - Sunday, 17 October 2010, 12:50 GMT
Last edited by MichaelGiacomelli (saratoga) - Sunday, 17 October 2010, 17:07 GMT
Task Type Bugs
Category Music playback
Status Closed
Assigned To No-one
Operating System Sansa e200
Severity Low
Priority Normal
Reported Version Daily build (which?)
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No


Ogg Vorbis playback on my e200v2 has been problematic with the daily builds for quite a while now. To put it plainly, it sounds like this:

I've tested with a variety of Ogg Vorbis audio, most of them Q7, but 22050Hz 56kbps podcasts trigger it too, so it isn't a bitrate/quality problem.

The problem seems to stem from the patch commited in r28000, which is supposed to reduce FCLK frequency when unboosted for AS3525 targets.
During testing I have confirmed the behavior on r28296, 28288 and 28000. Release 3.6 and r27999 don't exhibit the corruption.
Also, I was able to get stable playback on r28296 by reverting firmware/export/config/sansae200v2.h, firmware/target/arm/as3525/system-as3525.c and firmware/target/arm/as3525/clock-target.h to their r27999 versions.
This task depends upon

Closed by  MichaelGiacomelli (saratoga)
Sunday, 17 October 2010, 17:07 GMT
Reason for closing:  Duplicate
Additional comments about closing:  See  FS#11608 .