INSTR3MT

This code lets you play your TI-84+ like an instrument. It uses 15 buttons for playing music, and the rest of the buttons to determine which key and scale is being used.

Here is the file: http://ceme.tech/DL2410

In the future I hope to add the ability to tune the instrument (because calculators run at different speeds), and let the user define what scale is set by the [x] button.

Special thanks to fghsgh for replying to a question and showing how a single note might be generated. That code was extremely helpful.

Disclaimers: I have not tested this on a TI-83+. Tuning varies between calculators. A 2.5mm to 3.5mm adapter will be needed to use this with standard headphones

Nice work and a great idea. Pity that TI decided to remove the DBUS from newer 84+ calculators .

I was excited to try this but unfortunately do not have compatible headphones. I was hoping there was a quirk with the hardware that would generate sound

There is! You can tune an AM radio to static, put the calculator nearby, and you should be able to hear it.

I vividly remember my first exploration of monophonic calculator sound, hand-typing the hex for Piano83 into my TI-83 about 20 years ago (how is that possible??) to impress my Latin teacher and classmates.