merumerutho/maxtracker ? reverse-engineered prompt

Build me a Nintendo DS music tracker that feels like LSDJ, where I can make and edit songs directly on the handheld and save them as .mas files for MaxMod playback.

I want it to run well on real DS hardware and in an emulator, with one build for emulator use that includes the song data and another for flashcarts that saves to a data folder on the SD card. Please keep the interface geared toward fast tracker style input, with a clear song workflow, pattern editing, instrument and sample editing, and a waveform editor for shaping sounds.

If you need to look up any current docs or details for the DS toolchain, feel free to do that. Make sure the project builds cleanly and the app is usable from the start, even if some deeper music features are basic at first.