Gmu is a music player for the Dingoo. Gmu supports Ogg Vorbis, MP3, Musepack, FLAC and various module formats (such as s3m, stm, it, etc.). It also includes a playlist and a file browser.

Quote:

Here is a new Gmu release. It is available for the Dingoo A320 running Dingux, the GP2X running Open2X and the GP2X Wiz.

This release comes with several new* features:
» Module decoder plugin (using MikMod) for playing tracker modules (such as MOD, STM, S3M, IT, XM, …)
» Improved MP3 playback performance on GP2X and Wiz (MP3 @ 85 MHz on the GP2X) due to improved ARM assembly in mpg123
» Hardware and software volume control which should allow better volume control on the Wiz and might reduce background noise
» Lyrics support (text files and lyrics from ID3v2 tags are supported)
» Cover artwork support
» Display-off feature on the Wiz
» Various bugfixes

* At least they are new for the 0.7.0 branch. Some might have been available in the old 0.6.X branch already.

http://wejp.k.vu/gmu/gmu-0-7-0_beta5-for-dingoo-a320-gp2x-and-gp2x-wiz