artiphon instrument1 remap key to chord by sonic-pi

artiphon.rb

artiphon_address= "/midi/instrument1/*/*/"
artiphon_synth= :dsaw
remap_hash={40 => (ring 40,45,50,55,59,64),\
            41 => chord(:d4,:major),\
            42 => chord(:e4,:major),\
            43 => chord(:f4,:major),\
            44 => chord(:g4,:major)
            }

# if you want to remap keys to chords
# turn remap to true
remap=true

define :artiphon do |synth_name, event_address|
  use_real_time
  note, velocity = sync event_address+"note_on"
  # remap the key
  note=remap_hash[note] if remap_hash.keys.include?(note) if remap
  # synth the audio
  synth synth_name, \
    note: note, \
    release: 1.5,\
    amp: velocity/127.0
end

with_fx :reverb do
  live_loop :midi_play do
    artiphon artiphon_synth,artiphon_address
  end
end