diff --git a/lib/filters.c b/lib/filters.c
index a767549..d13eafe 100644
--- a/lib/filters.c
+++ b/lib/filters.c
@@ -13,20 +13,4 @@ float apply_preemphasis(ResistorCapacitor *filter, float sample) {
 float hard_clip(float sample, float threshold) {
     // Branchless clipping
     return fmaxf(-threshold, fminf(threshold, sample));
-}
-
-float voltage_db_to_voltage(float db) {
-    return powf(10.0f, db / 20.0f);
-}
-
-float power_db_to_voltage(float db) {
-    return powf(10.0f, db / 10.0f);
-}
-
-float voltage_to_voltage_db(float linear) {
-    return 20.0f * log10f(fmaxf(linear, 1e-10f)); // Avoid log(0)
-}
-
-float voltage_to_power_db(float linear) {
-    return 10.0f * log10f(fmaxf(linear, 1e-10f)); // Avoid log(0)
-}
+}
\ No newline at end of file
diff --git a/lib/filters.h b/lib/filters.h
index cf4d3b4..53bdaca 100644
--- a/lib/filters.h
+++ b/lib/filters.h
@@ -1,5 +1,4 @@
 #pragma once
-#define FILTER_TAPS 256
 #include <math.h>
 #include <string.h>
 #include <stdlib.h>
@@ -14,8 +13,4 @@ typedef struct
 void init_preemphasis(ResistorCapacitor *filter, float tau, float sample_rate);
 float apply_preemphasis(ResistorCapacitor *filter, float sample);
 
-float hard_clip(float sample, float threshold);
-float voltage_db_to_voltage(float db);
-float power_db_to_voltage(float db);
-float voltage_to_voltage_db(float linear);
-float voltage_to_power_db(float linear);
\ No newline at end of file
+float hard_clip(float sample, float threshold);
\ No newline at end of file
diff --git a/lib/fm_modulator.c b/lib/fm_modulator.c
index 0294084..8bdc904 100644
--- a/lib/fm_modulator.c
+++ b/lib/fm_modulator.c
@@ -11,6 +11,6 @@ float modulate_fm(FMModulator *fm, float sample) {
     float inst_freq = fm->frequency+(sample*fm->deviation);
     if (inst_freq < 0.0f) inst_freq = 0.0f;
     float out = sinf(fm->osc_phase);
-    fm->osc_phase += fmodf(fm->osc_phase + ((M_2PI * inst_freq) / fm->sample_rate), M_2PI);
+    fm->osc_phase = fmodf(fm->osc_phase + ((M_2PI * inst_freq) / fm->sample_rate), M_2PI);
     return out;
 }
\ No newline at end of file