Using lip pressure to control a “whammy bar” effect in Sonic Pi, driven by a Wind Controller.

whammy_bendy.rb

use_real_time # Preventing latency
use_tuning :just, :c # Just Intonation
transpo=-12 # Transposition offset
with_fx :compressor, threshold: 0.2 do # Preventing clipping
  with_fx :reverb, room: 0.8 do # Everything on the same reverb
    with_fx :rlpf, res: 0.7, cutoff_slide: 0.02 do |lipf| # Everything on breath-controlled low-pass filter
      with_fx :whammy, transpose_slide: 0.02, mix_slide: 0.02 do |wham| # Everything on a whammy bar
        tibi = synth :tb303, note: 0, wave: 1, pulse_width_slide: 0.02, res: 0.7, release: 1000, amp: 0 # TB-303-inspired pulse
        prof = synth :prophet, note: 0, res: 0.8, release: 1000, amp: 0 # Prophet-like sub
        live_loop :notes do
          note_on, velocity = sync "/midi/USB_Midi_Cable/4/1/note_on" # Incoming notes from Yamaha WX-11 wind controller
          note_on=note_on+transpo # Transpose by offset
          if velocity > 0 # Only use actual note-ons
            control tibi, note: note_on, amp: velocity / 150.0 # Incoming note
            control prof, note: note_on-12, amp: velocity / 127.0 # Lower octave
          end
        end
        live_loop :windy do # Use the incoming breath control, MIDI CC#2, to modulate the low-pass filter
          control_change, breath = sync "/midi/USB_Midi_Cable/4/1/control_change"
          if control_change==2
            control lipf, cutoff: breath
            control wham, mix: breath/127.0 # Mix the whammy bar through breath control
            control tibi, pulse_width: 0.5-(breath/256.0) # Also modulate the pulse width: lower is closer to square wave
          end
        end
        live_loop :bendy do
          bend_change = sync "/midi/USB_Midi_Cable/4/1/pitch_bend" # The WX-11 sends lip pressure as pitch bend
          bent=(bend_change[0]-8192)/ 8192.0 # Convert pitch bend to -1.0 to 1.0
            control wham, transpose: bent * 12 # Modulate the whammy bar
        end
    end
end
end
end