static inline void calc_freqmod(uint8_t chn)
/*
Calculates frequency change for SQ1, SQ2 and TRI based on
detuning, LFOs and envelope modulation.
*/
{
int16_t sum = 0;
for (uint8_t j = 0; j < 3; j++) {
if (mod_lfo_modmatrix[chn][j] > 0)
sum += mod_lfo_modmatrix[chn][j] * lfo[j].value;
}
if (chn <= CHN_TRI) {
int16_t dc = get_coarse_tune(chn);
dc += get_pitchbend(chn);
dc += sum / 128;
// Add detune frequency delta
dc += mod_detune[chn];
// Add envelope modulation, if set
dc += (int16_t)4 * mod_envmod[chn] * env[chn].value;
// Store total dc value, which will be applied by apply_freqmod
dc_temp[chn] = dc;
}
else if (chn == CHN_NOISE) {
noise_period += (env[2].value * (-mod_envmod[chn])) / 8;
}
}
static inline void calc_freqmod(uint8_t chn)
/*
Calculates frequency change for SQ1, SQ2 and TRI based on
detuning, LFOs and envelope modulation.
*/
{
// Define some helper arrays
static const LFO* lfos[] = {&lfo1, &lfo2, &lfo3};
int16_t sum = 0;
for (uint8_t j = 0; j < 3; j++) {
if (mod_lfo_modmatrix[chn][j] > 0)
sum += mod_lfo_modmatrix[chn][j] * lfos[j]->value;
}
if (chn <= CHN_TRI) {
int16_t dc = get_coarse_tune(chn);
dc += get_pitchbend(chn);
dc += sum / 128;
// Add detune frequency delta
dc += get_detune(chn);
// For square channels, also add in the envelope modulation, if any
int8_t env_fmod_val = (int8_t)envelopes[chn]->value - (int8_t)envelopes[chn]->sustain;
if (env_fmod_val > 0)
dc += env_fmod_val * get_envmod(chn);
// Store total dc value, which will be applied by apply_freqmod
dc_temp[chn] = dc;
}
}
