matrix-sequencer

Implementation of a 3 track programmable or Euclidean pattern sequencer using the SYINSI Euclidean Sequencer hardware and inspired by Tom Whitwell's Euclidean Sequencer as described on MuffWiggler.

Features

• 3 tracks plus optional inverted track 1 out
• Programmable 1-16 step sequences or Euclidean sequence per track
• Forward, Backward, Pendulum or Random play per track
• Shuffle amount per track
• Clock divider per track
• Randomly mutate patterns on each loop using either the original pattern, the last mutation or the inverse of the last mutation as the base for the next mutation
• Selectable Trigger, Clock width or Gate out per track
• Internal Clock - base speed, multiplier and width, optionally
• Optionally send clock (internal or external) to inverted out

Controls

Edit Mode 1 - (I) Pattern Definition Settings

• 1/Length
  • Rotate - Change length start or end length marker to define loop points
  • Click - Programmed Mode : Switch between start and end markers Euclidean mode: only the end marker can be moved to define a length
  • Hold (~2s) - Make Track 1 the active editing track
• 2/Density
  • Rotate - Programmed Mode : Move the edit cursor Euclidean mode: Change the density
  • Click - Programmed Mode : Invert the state of the step under the cursor (on/off) Euclidean mode: Nothing
  • Hold (~2s) - Make Track 2 the active editing track
• 3/Offset
  • Rotate - Offset in the steps in the direction turned. Note - steps outside the current length remain in place.
  • Click - Change Edit Modes indicated by 7th row of leds
  • Hold (~2s) - Make Track 3 the active editing track

Edit Mode 2 - (II) Track Configuration Settings

• 1/Length
  • Rotate - Set the divider value Beat Mode : 1,2,4,8,16,32,64 Triplet Mode : 3,6,9,12,15,18,21,24
  • Click - Switch between divider modes : Beat and Triplet
  • Hold (~2s) - Make Track 1 the active editing track
• 2/Density
  • Rotate - Select play mode : (->) Forwards, (<-) Backwards, (><) Pendulum and (R) Random
  • Click - Switch between pattern modes : (P) Programmed and (E) Euclidean
  • Hold (~2s) - Make Track 2 the active editing track
• 3/Offset
  • Rotate - Select output mode : Trigger (~20ms), Clock (match clock gate) and Gate (Output is high while step is active)
  • Click - Change Edit Modes indicated by 7th row of leds
  • Hold (~2s) - Make Track 3 the active editing track

Edit Mode 3 - (III) Pattern Modifiers (Shuffle & Mutation) settings

• 1/Length
  • Rotate - Change the shuffle amount (0-15) - works on both internal and external clock
  • Click - Nothing
  • Hold (~2s) - Make Track 1 the active editing track
• 2/Density
  • Rotate - Select Mutation factor - the higher the probability (0 to 50%) the more likely steps will be flipped at the end of a loop
  • Click - Choose Mutation Seed for next cycle : (O) Original pattern, (C) Current mutated pattern, (I) Inverse of the Current mutated pattern inverted (if mutation = 0 this inverts the pattern on each loop)
  • Hold (~2s) - Make Track 2 the active editing track
• 3/Offset
  • Rotate - Nothing
  • Click - Change Edit Modes indicated by 7th row of leds
  • Hold (~2s) - Make Track 3 the active editing track

Edit Mode 4 - (IV) Clock settings

Note - these settings are not currently persisted

• 1/Length
  • Rotate - Change the internal clock speed (~60bpm to 240bpm) changes by 1 bpm at a time so quite slow)
  • Click - Start/Stop the internal clock (when running the external clock input is ignored)
  • Hold (~2s) - Make Track 1 the active editing track
• 2/Density
  • Rotate - Change the clock pulse width (~3% to 90%)
  • Click - Send the clock to the offbeat output (the internal clock if running or the external clock if not)
  • Hold (~2s) - Make Track 2 the active editing track
• 3/Offset
  • Rotate - Set a multiplier for the clock speed (1x,2x,4x,8x,16x)
  • Click - Change Edit Modes indicated by 7th row of leds
  • Hold (~2s) - Make Track 3 the active editing track

Outputs

• 1 - As programmed on Track 1
• 2 - As programmed on Track 2
• 3 - As programmed on Track 3
• Offbeat - Inverse of Track 1 or the clock signal

Guidance

This is a work in progress!

• display reverts to a play view after ~5 seconds of not twiddling knobs
• Saving of changes (if there are any) occurs when you switch edit mode or when the display reverts to the play view
• sync resets on the rising edge
• you should probably expect to loose your saved tracks each time you update while everything is in flux

The Future

• Improve the UX!
• Configurable sync behaviour; rising or falling edge, reset and hold while high.
• Adjust brightness and encoder sensitivity
• I'm open to ideas
• Some testing.... :)