feat: add global lfo index and viz for cutoff lfoHEADmaster

1 files changed, 26 insertions, 7 deletions

diff --git a/src/synth_engine_v2.c b/src/synth_engine_v2.c
index e15df85..41cbcf4 100644
--- a/src/synth_engine_v2.c
+++ b/src/synth_engine_v2.c
@@ -147,9 +147,16 @@ do_fliter(synth_t *synth, float *sample, unsigned int sample_rate, int frame)
                             note->noteOffSample);
       if (adsr  < 0.1) adsr = 0.1;
       cutoff = cutoff * adsr;
+      reso = reso * adsr;
     }
   }
 
+  if (synth->lfo_on_cutoff) {
+    cutoff = cutoff + 22000 * CC_GET(lfo_amp) * osc_sin(synth->lfo_index);
+    if (cutoff <= 0) cutoff = 0.001;
+    synth->lfo_index = osc_sin_next(CC_GET(lfo_freq), synth->lfo_index);
+  }
+
   if (synth->filter) {
     if (cutoff == 0) cutoff = 0.001;
     lpf_update(reso, cutoff, sample_rate);
@@ -251,6 +258,10 @@ make_sample(synth_t * synth, unsigned int sample_rate, int frame)
   synth->adsr.d = CC_GET(adsr_d);
   synth->adsr.s = CC_GET(adsr_s);
   synth->adsr.r = CC_GET(adsr_r);
+
+  // global lfo
+  /* float glfo_value = osc_sin(synth->lfo_index); */
+  /* synth->lfo_index = osc_sin_next(CC_GET(lfo_freq), synth->lfo_index); */
   
   for (int i = 0; i < synth->midi_active_n; i++) {
     note = synth->midi_active[i];
@@ -261,7 +272,9 @@ make_sample(synth_t * synth, unsigned int sample_rate, int frame)
                           note->noteOffSample);
 
     float targ_freq = note->freq * CC_GET(pitch);
-    targ_freq = targ_freq + targ_freq * CC_GET(lfo_amp) * osc_sin(note->lfo_index);
+    float lfo_value = osc_sin(note->lfo_index);
+
+    targ_freq = targ_freq + targ_freq * CC_GET(lfo_amp) * lfo_value; //can switch to glfo
 
     note->lfo_index = osc_sin_next(CC_GET(lfo_freq), note->lfo_index);
 
@@ -346,17 +359,18 @@ get_frame(void *outputBuffer, synth_t *synth, int frame)
   if (!notes_active(synth)) {
     synth->f_adsr.elapsed = 0;
     synth->active = 0;
+    synth->lfo_index = 0.0f;
     // auto gain test
     //synth->cc_gain.target = 1;
   }
 
   if (!synth->delay) {
-    synth->counter = 0;
+    synth->delay_counter = 0;
   }
 
   sample = make_sample(synth, SAMPLE_RATE, frame);
-  synth->counter++;
-  if (synth->counter >= (unsigned long long)(synth->cc_del_time.target * SAMPLE_RATE)) {
+  synth->delay_counter++;
+  if (synth->delay_counter >= (unsigned long long)(synth->cc_del_time.target * SAMPLE_RATE)) {
     int idx = (synth->deli - (int)(synth->cc_del_time.target * SAMPLE_RATE)) % (SAMPLE_RATE * 10);
     float tmp;
     if (idx >= 0) {
@@ -545,6 +559,9 @@ init_synth(void)
   synth->f_adsr.r = 0.4;
   synth->f_adsr.elapsed = 0;
 
+  synth->lfo_on_cutoff = 0;
+  synth->lfo_index = 0.0f;
+
   synth->lfo.freq = 1.0f;
   synth->lfo.amp = 0.0f;
   synth->lfo.elapsed = 0;
@@ -569,11 +586,11 @@ init_synth(void)
   synth->delay = 0;
   synth->del = (float *) calloc(sizeof(float), SAMPLE_RATE * 30);
   synth->deli = 0;
-  synth->counter = 0;
+  synth->delay_counter = 0;
     
   synth->f_adsr_enabled = 0;
-  synth->filter = 1;
-  synth->biquad = 0;
+  synth->filter = 0;
+  synth->biquad = 1;
   synth->biquad_type = 'l';
   synth->clamp = 1;
 
@@ -654,6 +671,8 @@ free_synth(synth_t * synth)
 
   free(synth->del);
 
+  lpf_close();
+
   if (synth->patch_name) free(synth->patch_name);
   free(synth);
 }