-- bitwise ; a0f253ff89f6b244ea29a1e431dd9e5df5571a8b (jl)
let t = pulseCount (impulse ar 8e3 0) 0
    s = ((((t * 15) .&. (t .>>. 5)) .|.
          ((t *  5) .&. (mce2 (t .>>. 3) (t .>>. 4))) .|.
          ((t *  2) .&. (t .>>. 9)) .|.
          ((t *  8) .&. (t .>>. 11))) - 3) `modE` 256
in tanh (hpf (((s / 127) - 1) * 3) 20) * 0.02