Generating sync signals for brds (csaw sync)

Ott · 2018-03-19 20:41:53 UTC

In this setup, I have two csaw sync oscillators. The first one provides the sync signal, the second one provides the audio. I'd like to save on resources and only run enough code to provide the sync signal rather than also producing audio to throw away in the first one. Unfortunately, the brds objects contain almost no code, as all of it is stored in the libraries. Reading the source code for braids, it looks like the sync signal is more involved than a simple saw output:

github.com

axoloti/axoloti-factory/blob/dcdc5f445c9c0a2da0a30ea4e9a5f9fbf77f6546/objects/osc/brds/brds_analog.h#L125


INTERPOLATE_PHASE_INCREMENT
uint32_t pw = static_cast<uint32_t>(parameter_) * 49152;
if (pw < 8 * phase_increment) {
  pw = 8 * phase_increment;
}


int32_t this_sample = next_sample;
next_sample = 0;
	if (sync_in) {
if (*sync_in) {
  // sync_in contain the fractional reset time.
  reset_time = static_cast<uint32_t>(*sync_in - 1) << 9;
  uint32_t phase_at_reset = phase_ + \
      (65535 - reset_time) * (phase_increment >> 16);
  sync_reset = true;
  transition_during_reset = false;
  if (phase_at_reset < phase_ || (!high_ && phase_at_reset >= pw)) {
    transition_during_reset = true;
  }
  if (phase_ >= pw) {
    discontinuity_depth_ = -2048 + (aux_parameter_ >> 2);

Anyways, has someone already developed a way to generate sync signals? Or am I going to need to embed some of this code in an object and strip it down myself?