// 16 step cos (0..15) q31
int32_t fade[16];
// "a" fade out
// "b" fade in (new values)
int32_t a_alpha, b_alpha;
int32_t a_rp, b_rp;

fade[0] = 0x00000000;
fade[1] = 0x013ad060;
fade[2] = 0x04df2861;
fade[3] = 0x0ac933ad;
fade[4] = 0x12bec333;
fade[5] = 0x1c71898c;
fade[6] = 0x27821d59;
fade[7] = 0x3383a3e1;
fade[8] = 0x3fffffff;
fade[9] = 0x4c7c5c1e;
fade[10] = 0x587de2a6;
fade[11] = 0x638e7673;
fade[12] = 0x6d413ccc;
fade[13] = 0x7536cc52;
fade[14] = 0x7b20d79e;
fade[15] = 0x7ec52f9f;
a_alpha = b_alpha = 0;
a_rp = b_rp = 100;

{
  int32_t per_q16;
  int32_t pitch = param_pitch + inlet_pitch;
  MTOFEXTENDED(-pitch,
               per_q16); // exact values for integer(-64 64) midi pitches
  per_q16 = ___SMMLA(per_q16, 1389681862,
                     param_offset >> 5); // param_offset -64 64 q21
  if (per_q16 < 0)
    per_q16 = 0;
  if (per_q16 > ((attr_delayname.LENGTH - 17) << 16))
    per_q16 = ((attr_delayname.LENGTH - 17) << 16);

  int32_t rp_q16 =
      ((attr_delayname.writepos << 16) // pos of first non delayed in buf
       - ((2 * BUFSIZE - 2) << 16) - per_q16 + (attr_delayname.LENGTH << 16)) &
      ((attr_delayname.LENGTH << 16) - 1);
  // new values
  b_alpha = (rp_q16 & 0xFFFF) << 15;
  b_rp = rp_q16 >> 16;
}
// _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
for (int i = 0; i < BUFSIZE; i++) {
  int32_t a_out, b_out;
  {
    int32_t t1 = attr_delayname.array[(a_rp + 1) & attr_delayname.LENGTHMASK]
                 << 14;
    int32_t t0 = attr_delayname.array[a_rp] << 14;
    a_out = ___SMMLA(a_alpha, t1 - t0, t0 >> 1) << 1;
    a_rp = (a_rp + 2) & attr_delayname.LENGTHMASK;
  }
  {
    int32_t t1 = attr_delayname.array[(b_rp + 1) & attr_delayname.LENGTHMASK]
                 << 14;
    int32_t t0 = attr_delayname.array[b_rp] << 14;
    b_out = ___SMMLA(b_alpha, t1 - t0, t0 >> 1) << 1;
    b_rp = (b_rp + 2) & attr_delayname.LENGTHMASK;
  }
  //                         q31 (i<<27 for lin)
  outlet_out[i] = ___SMMLA(fade[i], b_out - a_out, a_out >> 1) << 1;
}
a_rp = b_rp;
a_alpha = b_alpha;