Many programs that claim to save uncompressed don't do it properly or put some extra content that misleads the cartridge.
Please use the program Audacity (audacity.sourceforge.net/).
* Open your favourity wav or mp3 file.
* File -> Export (Ctrl+Shift+E).
* (Save as type
Other uncompressed files.
* then click Options and choose WAV with encoding Unsigned 8 bit PCM.
* Sample rate choose 44100.
Then you need to rename the file to either start.wav or end.wav which are the songs played before and after writing a new game.
Please use the program Audacity (audacity.sourceforge.net/).
* Open your favourity wav or mp3 file.
* File -> Export (Ctrl+Shift+E).
* (Save as type

* then click Options and choose WAV with encoding Unsigned 8 bit PCM.
* Sample rate choose 44100.
Then you need to rename the file to either start.wav or end.wav which are the songs played before and after writing a new game.