add lfo-on-pitch toggle

3 files changed, 9 insertions, 2 deletions

diff --git a/src/synth_engine.h b/src/synth_engine.h
index 254bf21..6bc504a 100644
--- a/src/synth_engine.h
+++ b/src/synth_engine.h
@@ -110,6 +110,7 @@ typedef struct {
   adsr_t adsr;
   adsr_t f_adsr;
 
+  int lfo_on_pitch;
   int lfo_on_cutoff;
   float lfo_index;
   lfo_t lfo;
diff --git a/src/synth_engine_v2.c b/src/synth_engine_v2.c
index 41cbcf4..538a840 100644
--- a/src/synth_engine_v2.c
+++ b/src/synth_engine_v2.c
@@ -274,7 +274,10 @@ make_sample(synth_t * synth, unsigned int sample_rate, int frame)
     float targ_freq = note->freq * CC_GET(pitch);
     float lfo_value = osc_sin(note->lfo_index);
 
-    targ_freq = targ_freq + targ_freq * CC_GET(lfo_amp) * lfo_value; //can switch to glfo
+    if (synth->lfo_on_pitch) {
+      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);
 
@@ -524,7 +527,7 @@ init_synth(void)
   CC(synth->cc_cutoff,       "cutoff",    50,  22000,      30,  5000);
   //CC(synth->cc_resonance,    "resonance",  1,    10,      .02,  1);
   CC(synth->cc_resonance,    "resonance",  0.01, 10,      .02,  0.5);
-  CC(synth->cc_lfo_freq,     "lfo_freq",   1,  1000,        2,  1);
+  CC(synth->cc_lfo_freq,     "lfo_freq",   0.1,  10,      .01,  1);
   CC(synth->cc_lfo_amp,      "lfo_amp",    0,     1,     .01f,  0);
   CC(synth->cc_pitch,        "pitch",     -3,     4,    0.01f,  1);
   CC(synth->cc_adsr_a,       "attack",     0,     3,    0.01f,  0.00);
@@ -559,6 +562,7 @@ init_synth(void)
   synth->f_adsr.r = 0.4;
   synth->f_adsr.elapsed = 0;
 
+  synth->lfo_on_pitch = 0;
   synth->lfo_on_cutoff = 0;
   synth->lfo_index = 0.0f;
 
diff --git a/src/synth_gui.c b/src/synth_gui.c
index 4cdf37d..265b539 100644
--- a/src/synth_gui.c
+++ b/src/synth_gui.c
@@ -1258,6 +1258,8 @@ draw_main(synth_t *synth)
 
   draw_bars(synth, 20, 20, 200, 16, 3);
   draw_text(synth, WIDTH / 2 - 108, 20);
+  synth->lfo_on_pitch = GuiCheckBox((Rectangle){WIDTH / 2.0 - 108 + 120, 20, 12, 12},
+                                     "lfo", synth->lfo_on_pitch);
 
   //synth->viz.osc_enabled = GuiCheckBox((Rectangle){ x + width - 170, y, 16, 16 }, "osc", synth->viz.osc_enabled);
   if (synth->viz.osc_enabled) {