This is such a fun idea. What do you use for composition??? How did you get the soundfonts and how do you use them in composition/sound playback? What software do you use?
How I write these songs usually goes like this;
1.) Muck around on the piano until I get a melody and chord progression that I really like, takes 5 mins maximum for me to get something good.
2.) Record on the phone for future use in case I forget it.
3.) Go on Reaper (DAW) and create song while referring to recording and listening to official AA music to gain inspiration. Flick through different instrument sounds on soundfont until I find one that sounds just right.
I get my soundfonts from
https://musical-artifacts.com/ and use the tag, "nintendo ds" to get the DS soundfonts. I use Plogue's "Sforzando" to select and import soundfonts for MIDI usage. I do rip the MIDIs off the AA DS Roms as well via VGMTrans to see the MIDI techniques used, mainly echos, volume and drum patterns.
This is what a typical song looks like on Reaper
I could do a tutorial if people want it, it's a lot of fun to replicate Ace Attorney music.