rust_ribbon_controller

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Rust Language STM32L412 Ribbon Controller

Features

Three analog outputs

RIBBON CV: 1volt/per octave scaled control voltage generated by the main ribbon
GATE: 5 volt gate signal which is high when pressing the main ribbon and low otherwise
MOD CV: mod-wheel like control voltage generated by the MOD ribbon, in [0v, +5v]

MIDI output

Note on/off based on finger position on the ribbon
Pitch-bend message bends the pitch when the ribbon is in between notes
Mod: mod-wheel message generated by the MOD ribbon

Three pitch modes are available

QUANTIZE: notes are forced to be musical half steps, sliding around will zipper to new notes
ASSIST: when you first press a new note it is forced to be a musical half step, but continued sliding is smooth
SMOOTH: no quantization is performed, offers the greatest degree of pitch freedom but is difficult to play in tune

Glide control

Adds portamento to the RIBBON CV signal
This allows you to smooth out the steps when in QUANTIZE mode

Notes about the MIDI output

This software assumes that the pitch bend range on the receiving instrument is set to +/- 2 semitones (this is typically the default)
- If the Assist or Smooth modes seem crazy, make sure that the pitch bend range on your instrument is set to +/- 2 semitones
The MIDI output signal sends note-on, note-off, and pitch bend messages to generate the smooth ribbon action
- This works best with a mono instrument, and may act differently depending on the MIDI implementation of the receiving device
- If the receiving instrument has non-retriggering envelopes, it will smoothly slide as expected
- If the instrument has retriggering envelopes, each time you slide into a new note the envelopes will be triggered
The MIDI output starts on a fairly low note

Comments

Rust Language STM32L412 Ribbon Controller

Features

Three analog outputs

RIBBON CV: 1volt/per octave scaled control voltage generated by the main ribbon

GATE: 5 volt gate signal which is high when pressing the main ribbon and low otherwise

MOD CV: mod-wheel like control voltage generated by the MOD ribbon, in [0v, +5v]

MIDI output

Note on/off based on finger position on the ribbon

Pitch-bend message bends the pitch when the ribbon is in between notes

Mod: mod-wheel message generated by the MOD ribbon

Three pitch modes are available

QUANTIZE: notes are forced to be musical half steps, sliding around will zipper to new notes

ASSIST: when you first press a new note it is forced to be a musical half step, but continued sliding is smooth

SMOOTH: no quantization is performed, offers the greatest degree of pitch freedom but is difficult to play in tune

Glide control

Adds portamento to the RIBBON CV signal

This allows you to smooth out the steps when in QUANTIZE mode

Notes about the MIDI output

This software assumes that the pitch bend range on the receiving instrument is set to +/- 2 semitones (this is typically the default)

If the Assist or Smooth modes seem crazy, make sure that the pitch bend range on your instrument is set to +/- 2 semitones

The MIDI output signal sends note-on, note-off, and pitch bend messages to generate the smooth ribbon action

This works best with a mono instrument, and may act differently depending on the MIDI implementation of the receiving device
If the receiving instrument has non-retriggering envelopes, it will smoothly slide as expected
If the instrument has retriggering envelopes, each time you slide into a new note the envelopes will be triggered

The MIDI output starts on a fairly low note

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Rust Language STM32L412 Ribbon Controller

Features

Three analog outputs

MIDI output

Three pitch modes are available

Glide control

Notes about the MIDI output

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Rust Language STM32L412 Ribbon Controller

Features

Three analog outputs

MIDI output

Three pitch modes are available

Glide control

Notes about the MIDI output

Rear panel IO jacks and controls

Calibration

Power supply

Project status

Project goals