This work is licensed under CC BY-SA 4.0.

midihelpers library

Helpers for some MIDI stuff common to my usb_midi_clocker and Microlidian projects.

• Handle MIDI clock and timing, helper functions/macros to find the current MIDI time/position
• Optionally (define #USE_UCLOCK) use uClock for accurate & solid timing
  • Supports Teensy 4.0/4.1 and RP2040 platforms
• Functions to find the name of a MIDI note number (eg C5, D#3, etc)
• Keys and scales, with quantising and chord-building
• mymenu widgets for:
  • displaying/adjusting BPM
  • showing track position
  • switching clock sources between Internal/External/None.
  • adjusting root key, scale, chords and inversions
• parameters library uses features of this for the 1v/oct tracking quantisation etc
• Defines for GM drum note numbers
• For RP2040 boards, set up MIDI USB with TinyUSB

Requirements

• vortigont/LinkedList library
• (if using USE_UCLOCK mode) midiliab/uClock library (version 2.0.0 or above)

Setting up MIDI and USB MIDI on RP2040 boards

USB MIDI device

• add -DUSE_TINYUSB
• define -DUSB_MIDI_VID=0x1337 vendor ID
• define -DUSB_MIDI_PID=0xBEEF product ID
• define -DUSB_MIDI_MANUFACTURER=""TyrellCorp"" manufacturer string
• define -DUSB_MIDI_PRODUCT=""FunkyDevice"" product string

Serial/DIN MIDI output

• define -DUSE_DINMIDI
• define -DMIDI_SERIAL_SPIO
• define -DMIDI_SERIAL_OUT_PIN=D6 or whatever pin you're using for output

todo

• a class to make it simple to track which notes are held by an input or output
• chord inversions
• fix envelopes
• 'hold' stage doesnt work properly when inverted