Sequencer Implementation

[jmidt]

Sequencer

The sequencer controls the 8 samplers. When editing the sequencer steps, the musical keyboard keys change to change sampler (black keys) and edit steps (white keys). Features are below, with those already implemented marked with a check mark. GFI marks something suitable for a newcomer to get started on.

• [ ] Tempo (controls global clock)
• [ ] Start/stop (controls global clock)
• [ ] Sequencer screen
  • [ ] Per-trigger settings
    • [ ] 3. conditional trigs
      • [ ] Chance / 2 in 4 etc
      • [ ] Draw 2 in 4 as ○ ● ○ ○
      • [ ] Single encoder, turn CW for X in Y, CCW for chance
    • [ ] 2. velocity
    • [ ] parameter locks?
  • [ ] Global
    • [ ] 1. Tempo / swing
    • [ ] 4. Sequence length
• [ ] Elegant solution for substeps
  • [ ] Ratchets/Retriggers?
  • [ ] Finite list of selectable combinations
  • [ ] Full access to individual substeps with led "zoom"
• [ ] Move file handling out to the Sequencer, from the individual Samplers.
• [x] Mutes
• [ ] 5. Sends for samplers
  • [ ] Sampler objects own their own Sends
  • [ ] Sequencer::sends_screen() to get
• [ ] 6. Variations
  • [ ] 1 base sequence, 4 variations, of which zero or one can be active at any time
  • [ ] variations are "diffs", i.e. only contain changes to the base sequence, not a copy of the base sequence
  • [ ] variations can be
    • [ ] queued for the next "round" (click)
    • [ ] switched on instantly and held with a momentary switch (shift + click)
    • [ ] queued and enabled for all future rounds
    • [ ] switched on instantly and kept on
  • [ ] step-toggles in variations have three states: on, off, "as in base"
• [ ] Future extensions:
  • [ ] Longer sequences than 16 steps.
    • [ ] Pages? +/- could be reused to switch pages
  • [ ] GFI Long press (or press and encoder turn) does not toggle step
  • [ ] Choke groups
  • [ ] Mute groups
  • [ ] Parameter locks
    • [ ] Only sampler and sends props need to be lockable
  • [ ] Velocity view - view velocity on LEDs.

Global clock

• [x] Count microsteps (192?) with an unsigned int
• [x] clock range in ProcessData (last time, current time)
• [x] check if the desired step is in clock range
• [x] Sent from engine manager
• [x] Control through separate ClockManager
  • [x] void start(), void stop(bool reset = true), void reset()
  • [x] float bpm()
• [x] Future extensions
  • [x] "Subscribe" to clock "events", i.e. handle every 16th etc.
    • Done by checking data.clock.contains_multiple, data.clock.count_multiple and data.clock.position_of_multiple
  • [ ] GFI swing

[jmidt]

I added a small point about switching to a sampler track automatically when pressing either sequencer or sampler button.

[jmidt]

Added a point about the file handling. This should be done in the sequencer.