In mid-2004, I ported the GSM RPE-LTP (also called GSM Full Rate) audio codec, which has been used in mobile phones, to the Game Boy Advance. Now you can use your GBA as a portable music player, with up to 150 minutes of Good Sounding Music on a 256 Mbit flash cart.
From mid-2004 to mid-2019, GSM Player for GBA went unmaintained, and changes to popular GBA homebrew toolchains rendered it unbuildable. This repository ports the application to a more recent version of devkitARM.
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If building from source:
make build/allnewgsm-bare_mb.gba padbin 256 build/allnewgsm-bare_mb.gba
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Convert audio files to GSM at 18157 Hz (a nonstandard rate; see
docs/lying_to_sox.txt
for how to force this in SoX and FFmpeg) -
Pack them into a single GBFS file using
gbfs
included with devkitARM tools:gbfs gsmsongs.gbfs *.gsm
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Concatenate the player and the songs.
- On Windows:
copy /b build\allnewgsm-bare_mb.gba gsmsongs.gbfs allnewgsm.gba
- On UNIX:
cat build/allnewgsm-bare_mb.gba gsmsongs.gbfs > allnewgsm.gba
- On Windows:
To control the player:
- Left: Previous track
- Right: Next track
- L: Seek backward
- R: Seek forward
- Select: Lock other keys
- Start: Pause or resume
Copyright 2004, 2019 Damian Yerrick