From fab44bcc42a4c9259ee542cbca7b657b8864e8cc Mon Sep 17 00:00:00 2001
From: KubaPro010 <kuba.pro010@gmail.com>
Date: Tue, 25 Mar 2025 17:10:15 +0100
Subject: [PATCH] im a genius

---
 lib/filters.c | 16 ----------------
 lib/filters.h |  1 -
 src/fm95.c    | 10 +++++-----
 3 files changed, 5 insertions(+), 22 deletions(-)

diff --git a/lib/filters.c b/lib/filters.c
index ae139b0..ed1017c 100644
--- a/lib/filters.c
+++ b/lib/filters.c
@@ -18,22 +18,6 @@ float sincf(float x) {
     return (x == 0.0f) ? 1.0f : sinf(M_PI * x) / (M_PI * x);
 }
 
-void init_bpf(FIRFilter *bpf, float start, float end) {
-	int m = FILTER_LEN - 1;
-	float sum = 0.0f;
-
-	for(int n = 0; n < FILTER_LEN; n++) {
-		float x = n-m/2.0f;
-		float h1 = sincf(2.0f*start*x) * (0.54 - 0.46 * cosf(M_2PI * n / m));
-		float h2 = sincf(2.0f*end*x) * (0.54 - 0.46 * cosf(M_2PI * n / m));
-		bpf->filter[n] = h1-h2;
-		sum += bpf->filter[n];
-	}
-
-	for(int n = 0; n < FILTER_LEN; n++) {
-		bpf->filter[n] /= sum;
-	}
-}
 void init_lpf(FIRFilter *lpf, float freq) {
 	int m = FILTER_LEN - 1;
 	float sum = 0.0f;
diff --git a/lib/filters.h b/lib/filters.h
index 185db30..e42d014 100644
--- a/lib/filters.h
+++ b/lib/filters.h
@@ -23,6 +23,5 @@ typedef struct filters
 	float filter[FILTER_LEN];
 	int filter_idx;
 } FIRFilter;
-void init_bpf(FIRFilter *bpf, float start, float end);
 void init_lpf(FIRFilter *lpf, float freq);
 float fir_filter(FIRFilter *fir, float sample);
\ No newline at end of file
diff --git a/src/fm95.c b/src/fm95.c
index 1e3e121..2e55936 100644
--- a/src/fm95.c
+++ b/src/fm95.c
@@ -406,7 +406,7 @@ int main(int argc, char **argv) {
 
 	// #region Setup Filters/Modulaltors/Oscillators
 	Oscillator osc;
-	init_oscillator(&osc, polar_stereo ? 31250.0 : 19000, sample_rate);
+	init_oscillator(&osc, polar_stereo ? 31250.0 : 9500, sample_rate);
 
 	FMModulator sca_mod;
 	init_fm_modulator(&sca_mod, sca_frequency, sca_deviation, sample_rate);
@@ -485,21 +485,21 @@ int main(int argc, char **argv) {
 			output[i] = mono*MONO_VOLUME;
 			if(stereo) {
 				float stereo = (ready_l - ready_r) / 2.0f;
-				float stereo_carrier = get_oscillator_sin_multiplier_ni(&osc, polar_stereo ? 1 : 2);
+				float stereo_carrier = get_oscillator_sin_multiplier_ni(&osc, polar_stereo ? 1 : 4);
 
 				if(polar_stereo) {
 					output[i] += ((stereo+0.2)*stereo_carrier)*STEREO_VOLUME;
 				} else {
-					float pilot = get_oscillator_sin_multiplier_ni(&osc, 1);
+					float pilot = get_oscillator_sin_multiplier_ni(&osc, 2);
 					output[i] += pilot*PILOT_VOLUME +
 						(stereo*stereo_carrier)*STEREO_VOLUME;
 				}
 			}
 			if(rds_on && polar_stereo == 0) {
-				float rds_carrier = get_oscillator_sin_multiplier_ni(&osc, 3);
+				float rds_carrier = get_oscillator_sin_multiplier_ni(&osc, 6);
 				output[i] += (current_rds_in*rds_carrier)*RDS_VOLUME;
 				if(!sca_on) {
-					float rds2_carrier_66 = fir_filter(&rds2_bpf, rds_carrier*get_oscillator_sin_multiplier_ni(&osc, 0.5f));
+					float rds2_carrier_66 = get_oscillator_sin_multiplier_ni(&osc, 7);
 					output[i] += (current_rds2_in*rds2_carrier_66)*RDS2_VOLUME;
 				}
 			}