ale 
//      based on midi key b (60)
//      Each string is triggered by a specific
//      position of the "hand"
//-----------------------------------------------------------------------
harpe(C,N,b) = hand(b) <: par(i, N, position(i+1)
                        : string(C,Penta(b).degree2Hz(i), att, lvl)
                        : pan((i+0.5)/N) )
                        :> _,_
    with {
        att  = hslider("[3]Resonance[acc:2 1 -10 0 12]", 4, 0.1, 10, 0.01); 
        hand(48) = vslider("h:[1]Instrumen