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thank you @Eli, I used OSC Hook to do the @robin.newman Theremin ^^

Here another example of Theremin Gravity sensor with OSC Hook

use_debug false

define :putsPretty do |n,p|
  num=(n*10**p).round/(10**p).to_f
  return num
end

define :scalev do |v,l,h|
  return (l+v).to_f*(h-l)/100
end

live_loop :kik do
  32.times do
    sample :elec_bong, amp: 1.2 if (spread 3, 8).tick
    sample :elec_bong, amp: 1.2 if (one_in 64)
    sample :perc_snap, amp: 0.6 if (spread 7, 11).look
    sample :bd_haus, amp: 2 if (spread 6, 32).look | (one_in 32)
    sample :bd_boom ,amp: 3 if (one_in 64)
    sample :elec_mid_snare ,amp: 1 if (one_in 48)
    sleep 0.125
  end
end




  with_fx :ixi_techno,phase: 4,phase_offset: 1,mix: 0.8 do |p|
    set :p, p
    use_synth :pulse
    k=play octs(0,5),sustain: 10000,amp: 0
    set :k,k
    live_loop :theremin do
      use_real_time
      b = sync "/osc/accelerometer/gravity/y"
      c = sync "/osc/accelerometer/gravity/x"
if b[0]<0
      r1=scalev(0.1,30,100)
else
      r1=scalev(b[0],30,100)
end
if c[0]<0
      r2=scalev(0.1,0.1,1)
else
      r2=scalev(c[0],0.1,1)
end
      puts putsPretty(r1,2),putsPretty(r2,2)
      if r1  <  60 then #adjust note pitch, and restore volume to 0.7
        control get(:k),note: octs(r1+12,3),note_slide: 0.01 ,amp: 0.7,amp_slide: 0.2
      else #set output vol to 0
        control get(:k),amp: 0,amp_slide: 0.2
      end
      if r2 < 0.8 then #adjust phase modulation rate, and restore mix to 0.8
        control get(:p),phase: r2*10,phase_slide: 0.01,mix: 0.9,mix_slide: 0.2
      else #switch off phase modulation by setting mix to zero
        control get(:p),mix: 0,mix_slide: 0.2
      end
    end
  end

tuto-track