Work in progess

miditrellis

Firmware for midi controller with Adafruit Neotrellis and Teensy 4.0

2 x Neotrellis boards (X = 8, Y = 4)

3 x push-buttons with external pullup-resistors

1 x custom lego casing

Neotrellis tiling is upside down because of cables

Pressing the white button changes the Neotrellis view from Keyboard view to Sequencer view. The sequencer is a step-sequencer and inputs the last note pressed in Keyboard view at the chosen location in a 32 step sequence. Step sequencer syncs to DAW and steps are synced to 1/8th notes.

/* Trellis buttons:

• 0x30 0x2F
• 27-26-25-24 31-30-29-28
• 19-18-17-16 23-22-21-20
• 11-10-09-08 15-14-13-12
• 03-02-01-00 07-06-05-04
• Translated into
• 24-25-26-27-28-29-30-31
• 16-17-18-19-20-21-22-23
• 08-09-10-11-12-13-14-15
• 00-01-02-03-04-05-06-07
• Button setup
• Green button - Play sequence
• Red button - Stop playing
• White button - Switch view (keyboard -> sequence)
• Views:
• • Keyboard (2 keyboard rows, western scale)
• • Step sequencer