fdbkcomb
feedback comb filter, y(n) = b*x(n)+a*y(n-D)
Inlets
frac32buffer in
Outlets
frac32buffer out
Parameters
frac32.s.map.ratio a
frac32.s.map.ratio b
Attributes
spinner delay
Declaration
int16_t d[attr_delay];
int dpos;
Init
int i;
for (i = 0; i < attr_delay; i++)
d[i] = 0;
dpos = 0;
Control Rate
int32_t a2 = param_a << 4;
int32_t b2 = param_b << 4;
Audio Rate
int32_t dout = d[dpos] << 16;
int32_t din = ___SMMUL(b2, inlet_in);
din = ___SMMLA(a2, dout, din);
d[dpos++] = din >> 15;
outlet_out = din;
if (dpos == attr_delay)
dpos = 0;