StOutShelved
Audio output, stereo has inbuild volume control and filter-shelving to adjust the spectral slope The filter can easily go into self-oscillation when the high shelf is accentuated.
Inlets
frac32buffer Left channel
frac32buffer Right channel
Outlets
None
Parameters
frac32.u.map volume
frac32.s.map.pitch mid
frac32.s.map shelf
frac32.u.map.gain feed
Displays
frac32.vu vuLeft
frac32.vu vuRight
int32_t lpl, lpr, fdl, fdr;int32_t frq;
MTOF(param_mid, frq)
int j;
for (j = 0; j < BUFSIZE; j++) {
int32_t inl = inlet_left[j] + fdl;
int32_t inr = inlet_right[j] + fdr;
lpl = ___SMMLA(inl - lpl << 1, frq, lpl);
lpr = ___SMMLA(inr - lpr << 1, frq, lpr);
int32_t tmpl = (lpl << 1) - inl;
int32_t tmpr = (lpr << 1) - inr;
inl += ___SMMUL(((inl + lpl) >> 1) - inl, -param_shelf) << 5;
inr += ___SMMUL(((inr + lpr) >> 1) - inr, -param_shelf) << 5;
fdl = __SSAT(___SMMUL(inl - inlet_left[j], param_feed) << 1, 27);
fdr = __SSAT(___SMMUL(inr - inlet_right[j], param_feed) << 1, 27);
AudioOutputLeft[j] = __SSAT(___SMMUL(inl << 3, param_volume << 2), 28);
AudioOutputRight[j] = __SSAT(___SMMUL(inr << 3, param_volume << 2), 28);
}
disp_vuLeft = AudioOutputLeft[0];
disp_vuRight = AudioOutputRight[0];