float p, dp;
float x0, x1;
float y0Saw;
float y0Sqr;
float y0Tri, y1Tri;

p = 32;
x0 = 0;
y0Saw = 0;
y0Sqr = 0;
y0Tri = 0;

int32_t idp;
MTOFEXTENDED(param_pitch + inlet_pitch, idp);
dp = idp * (0.25f / (1 << 30));

p += dp;
if (p > 33) {
  p -= 1;
  x0 -= 1;
}
x1 = x0;
y1Tri = y0Tri;
float pm = p + arm::q_to_float(___SMMUL(inlet_mod, param_mod), 27 - 6);
x0 = pm;
pm -= (int32_t)pm;
float saw = pm * 2 - 1;
y0Saw = saw * saw;
float sqr = saw > 0 ? 1.0f : -1.0f;
y0Sqr = 2 * fabs(saw) - 1;         // tri
y0Tri = y0Sqr * y0Sqr * sqr - sqr; // sine
float xs = pm <= 0.5f ? pm : 1.0f - pm;
float x1_x0 = x1 - x0;
if (fabs(x1_x0) > 0.0001f) {
  float _x1_x0 = 1.0f / x1_x0;
  outlet_tri = arm::float_to_q((y1Tri - y0Tri) * _x1_x0, 27 - 3);
} else {
  outlet_tri = arm::float_to_q(y0Sqr, 27);
}