Variable number of samples within shared_bindings_synthio_lfo_tick.

Author: relic-se

shared-bindings/synthio/__init__.c

@@ -292,7 +292,7 @@ MP_DEFINE_CONST_FUN_OBJ_1(synthio_voct_to_hz_obj, voct_to_hz);
 
 #if CIRCUITPY_AUDIOCORE_DEBUG
 static mp_obj_t synthio_lfo_tick(size_t n, const mp_obj_t *args) {
-    shared_bindings_synthio_lfo_tick(48000);
+    shared_bindings_synthio_lfo_tick(48000, SYNTHIO_MAX_DUR);
     mp_obj_t result[n];
     for (size_t i = 0; i < n; i++) {
         synthio_block_slot_t slot;

shared-module/synthio/__init__.c

@@ -294,7 +294,7 @@ void synthio_synth_synthesize(synthio_synth_t *synth, uint8_t **bufptr, uint32_t
         return;
     }
 
-    shared_bindings_synthio_lfo_tick(synth->sample_rate);
+    shared_bindings_synthio_lfo_tick(synth->sample_rate, SYNTHIO_MAX_DUR);
 
     synth->buffer_index = !synth->buffer_index;
     synth->other_channel = 1 - channel;
@@ -487,9 +487,9 @@ uint32_t synthio_frequency_convert_scaled_to_dds(uint64_t frequency_scaled, int3
     return (sample_rate / 2 + frequency_scaled) / sample_rate;
 }
 
-void shared_bindings_synthio_lfo_tick(uint32_t sample_rate) {
+void shared_bindings_synthio_lfo_tick(uint32_t sample_rate, uint16_t num_samples) {
     mp_float_t recip_sample_rate = MICROPY_FLOAT_CONST(1.) / sample_rate;
-    synthio_global_rate_scale = SYNTHIO_MAX_DUR * recip_sample_rate;
+    synthio_global_rate_scale = num_samples * recip_sample_rate;
     synthio_global_W_scale = (2 * MP_PI) * recip_sample_rate;
     synthio_global_tick++;
 }

shared-module/synthio/__init__.h

@@ -90,4 +90,4 @@ int synthio_sweep_in_step(synthio_lfo_state_t *state, uint16_t dur);
 
 extern mp_float_t synthio_global_rate_scale, synthio_global_W_scale;
 extern uint8_t synthio_global_tick;
-void shared_bindings_synthio_lfo_tick(uint32_t sample_rate);
+void shared_bindings_synthio_lfo_tick(uint32_t sample_rate, uint16_t num_samples);