Sonic Pi Drums

gistfile1.txt

live_loop :drums do
  
  ## Edit BPM and Time Signature ##
  use_bpm 120
  timesignature = [4,4]
  #################################
  
  ts = timesignature[0].to_f/timesignature[1].to_f
  
  if ts == 1
    
    ##################### 4/4 Pattern #####################
    kick =  [1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0]
    snare = [0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0]
    hats =  [1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0]
    cowbell = [0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 1, 0]
    ##################### end Pattern #####################
    
  elsif ts == 0.75
    
    ############### 3/4 Pattern ###############
    kick =  [1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
    snare = [0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0]
    hats =  [1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0]
    cowbell = [0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1]
    ############### end Pattern ###############
    
  else
    puts "Unrecognised Time Signature"
    stop
  end
  
  (kick.length).times do |beat|
    sample :drum_heavy_kick, amp: 10  if kick[beat] == 1
    sample :drum_snare_soft, amp: 10 if snare[beat] == 1
    sample :drum_cymbal_closed, amp: 10  if hats[beat] == 1
    sample :tabla_te_ne, amp: 10  if cowbell[beat] == 1
    sleep 1.0/timesignature[1]
  end
  
end

Designed to be edited 'live' - experiment with switching '1's to '0's to create different patterns.

You can a;so switch between 3/4 and 4/4 Time Signatures