FS#11183 - Multichannel Ogg Vorbis not playing with Rockbox

Attached to Project: Rockbox
Opened by Dave Brunker (MadRat) - Wednesday, 07 April 2010, 06:46 GMT
Last edited by Dave Hooper (stripwax) - Friday, 14 May 2010, 22:27 GMT
Task Type Bugs
Category Music playback
Status Closed
Assigned To No-one
Operating System iPod 5G
Severity Low
Priority Normal
Reported Version Release 3.4
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No


I've tested several 6 channels Vorbis files with Rockbox. The file info (tags, bitrate, etc) are read, the player pauses for a while then tries to load the next file in the list. Here is one example:

"The samples are taken from a japanese war/naval movie (Lorelei), since what we normally do isn't music, it's movie soundtracks.

60 seconds Ogg Vorbis sample. ( (2.7 MB) Q4, channel order FL, C, FR, SL, SR, LFE (this is the besweet default and what Winamp's Vorbis decoder claims is the right order). Encoded with libvorbis.dll using libvorbis 1.1.2, downloaded from (this one: and BeSweetGUI 0.7b8/BeSweet 1.5b30.

BeSweet commandline: "C:\Program\BeSweet\BeSweet.exe" -core( -input "c:\lorelei\VTS_02_1 - 0x80 - Audio - AC3 - 6ch - 48kHz - DRC - Japanese - DELAY 0ms.ac3" -output "c:\lorelei\6ch.Vorbis.Q4.ogg" ) -azid( --maximize ) -split( -start 570 -end 630 ) -ogg( -q 0.400 -6ch 1 )"
This task depends upon

Closed by  Dave Hooper (stripwax)
Friday, 14 May 2010, 22:27 GMT
Reason for closing:  Not a Bug
Comment by Dave Hooper (stripwax) - Wednesday, 14 April 2010, 08:45 GMT
The vorbis decoder for rockbox supports at most 2 channels. It does not support mixing multichannel audio down to 2 channels.
Out of interest, what would you expect to happen, when you play a multichannel audio file on a device with only 2 channels?
Comment by Dave Hooper (stripwax) - Friday, 14 May 2010, 22:27 GMT
Closing. Reopen if you have more information to support this being a bug, rather than an unimplemented feature.