DCAsm
De clicked and smooth "Digital" Controlled Amplifier: multiplies "in" and "gain" inputs. The gain input is shortly interpolated, DCA is "anti "clicked by updating gain at zero crossings of the input. The update is smoothed by two fast filters. This allows very sharp attack transients without additional clicks.
Inlets
frac32buffer audio input
frac32 gain input
Outlets
frac32buffer output
Declaration
int32_t _in = 0, g = 0, fg = 0, ffg = 0;
Audio Rate
if ((inlet_in > 0) != (_in > 0)) {
g = inlet_gain;
}
fg = (g + fg) >> 1;
ffg = (fg + ffg) >> 1;
outlet_out = ___SMMUL(_in, ffg) << 5;
_in = inlet_in;