Shepard Tone Keyboard

Creations & Ideas
1

You can play shepard tones on your keyboard with this.

# Shepard Tone Keyboard

# Coded by Loopiloop


#---settings---

#set number of octaves the shepard tone uses
n = 15
#volume control
v = 0.25
#device
d = "masterkey_61_0:1"


#---code---

#remove delay
use_real_time

#repeat forver
live_loop :shepard do
  
  #wait for keyboard input and get its values
  key, velocity = sync "/midi:" + d + "/note_on"
  
  #reset octave counter
  tick_reset :octave
  
  #for the desired amount of octaves do
  n.times do
    
    #determine pitch
    note = (range 0, 12)[key] + tick(:octave) * 12
    
    #determine volume
    amplitude = ((n*12)-2.0*note-1)/((n*12)-1.0)
    if amplitude < 0
      amplitude = amplitude * -1
    end
    amplitude = (1 - amplitude)
    
    #play note
    play note, amp: amplitude * (velocity/127.0) * v
    
  end
end
1 Like
2

hi @Loopiloop

Thanks for the sharing ! I learnt today what Shepard tones are :slight_smile:
Cheers