osc4_cc   xtlang

(bind-func osc4_cc
  (lambda ()
    (let ((val 0.0:f)
          (osc-octave 0)
          (osc-tune 1.0)
          (osc-octave-value 1.0))
      (lambda (inst offset:i32 cc:i32 value:i32)
        ;; (println 'osc4_cc cc value)
        (set! val (/ (i32tof value) 127.0))
        (cond ((= cc (+ offset 0)) ;; amplitude of osc 1
               (set_osc4_amp inst val))
              ((= cc (+ offset 1)) ;; waveform of osc 1 (PARAM_SINE,PARAM_SAW,PARAM_PULSE,PARAM_TRI,PARAM_WT)
               (set_osc4_wave inst (get_waveform value)))
              ((= cc (+ offset 2)) ;; pulse width (for PARAM_PULSE wave) 0.0-1.0 (0.5 is square)
               (set_osc4_pw inst val))
              ((= cc (+ offset 3)) ;; frequency shift of osc - tuning - 2.0 up
               ;; tune 0.5 down tune etc..
               (set! osc-tune (+ 1.0 (+ -0.2 (* val 0.4))))
               (set_osc4_tune inst (* osc-octave-value osc-tune)))
              ((= cc (+ offset 4))
               (set! osc-octave (- (clamp value 61 70) 64))
               (set! osc-octave-value (octave_from_val val))
               (set_osc4_tune inst (* osc-octave-value osc-tune))
               ;; (println 'v osc4-octave 'v2 osc4-octave-value)
               void)
              ((= cc (+ offset 5)) ;; phase (default is 0.0)
               (set_osc4_phase inst val)))))))