I’ve just released the first version of STEPPER, my new 16-step sequencer for the Game Boy Advance (GBA). It has access to the original 4 channels of the DMG (2 square waves, 1 programmable wave and 1 noise channel). You have 4 banks of 8 patterns available and the patterns can be chained (Only one at a time for now but this could change in the future).
Here is a little demo:
The project is open sourcehttps://git.badd10de.dev/stepper and you can get the GBA rom on its itch.io page starting at 0 bucks.
I hope you like it and let me know if you try it out and what you come up with!
STEPPER v1.3 is out! I’ve wrote about the main changes here:
Biggest changes are
Quick saving with SELECT + START
Per channel parameter adjustment and note transposition
SELECT + L/R to adjust notes by octave or BPM by increments of 10
Volume should be way louder than on v1.0 and I included a .cia for loading directly on 3DS consoles.
I’ve also tested it on a GBA SP with a cheap flash cart and works great. I’m waiting for an Everdrive to be delivered to be able to do more hardware experiments. Particularly I’m interested to see if I can get a sort of CV gate out working using a modified GBA Link cable.
I’m preparing a new version of STEPPER that should come out this week (hopefully). It will include link cable and audio sync, theming support and some bugfixes and misc improvements.
I already have a proof of concept for the link cable sync working. Here you can see a GBA clocking a PO-20:
Note that the gate output is of 3.3V, which is enough to trigger the Gate In on my Microbrute and control some other CV parameters but I can’t guarantee it will work with all Eurorack modules or CV capable synths without some amplification:
As for the theming support I currently have 4 default themes in place but I’m open for feedback and contributions from the community: