Here it is! There’s still some work to be done, like changing from a major to a pentatonic scale, but for now the hardware is complete:
I got all the parts together and got to work putting together a configuration of 8 Trellis boards.
With all the parts Adafruit included a laser cut acrylic case. Nice! They call this configuration the Hella-OONTZ or the Hella UNTZtrument… I’m not so into either of those names, so I decided to codename my project The Sound Matrix. I think it’s got a better ring to it.
Here’s a quick lights and buttons test (no sound is coming from the Matrix. Music is in the background):
Slapped the rest of the buttons and the top on and it’s DONE! Short post to follow with video of the Sound Matrix in action.
HUGE MILESTONE – Trellis Pad Works as a MIDI sequencer… AKA NOTES ARE BEING PLAYED!
WOO!! So what’s going on here? The Trellis is plugged into an Arduino Leonardo, which is hooked up to my computer via USB. The Trellis sends information to the Leonardo based on buttons that are activated (pushed once); if a button is active, the Trellis will tell the Leonardo to send a MIDI message, corresponding to that button’s position, to the computer.
MIDI is essentially the language digital instruments use to communicate with a computer and ultimately play a sound. All electronic keyboards use MIDI to play notes.
Logic Pro X, basically a pro version of the music-making software Garageband, uses the MIDI message sent from the Leonardo to have the selected instrument play a note. In other words, pushed buttons make sounds play from music-making software on a computer. Awesome.
We’re getting close. Time to go full scale.
Good news! We found a different way to go about this! A way with single color LEDs, much smaller buttons, and a total of 4 WIRES coming out. WOW. It’s called the Adafruit Trellis. I soldered on the LEDs and, after some trial and error, got it to light up!
Oh yeah, there’s also this: Adafruit just within the last week came out with a support for tiling up to 8 of these Trellis boards together, and they have example code and libraries to help get it going. AKA EXACTLY WHAT I NEEDED . It’s time to start making music.