W/Tape: clocked looping

w-clocked-looping.lua

-- W/Tape: clocked looping
-- as shown in https://youtu.be/2RUHr-iX1VE?si=Ibf7IRycZX5VoLng&t=667
-- requires crow

-- patch crow output 1 to an oscillator's v/8
-- patch crow output 2 to an envelope generator
-- set THIS & THAT to 'loop'
-- tap 'play' to get things rolling
-- tap 'record' to arm recording

-- execute 'capture_loop()' to start recording on next beat
-- execute 'capture_loop()' to stop recording on next beat
-- W/ will automatically start playback once recording has ended

function init()
  notes = sequins{0,4,7,9,11}
  clock.run(play_note)
  clock.run(trigger_envelope)
end

function play_note()
  while true do
    clock.sync(1 / 3)
    output[1].volts = notes() / 12
  end
end

function trigger_envelope()
  while true do
    clock.sync(1/2)
    state = state == 10 and 0 or 10
    output[2].volts = state
  end
end

function capture_loop()
  clock.run(
    function()
      clock.sync(1)
      output[4](pulse())
    end
  )
end