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Code Issues Activity

remove lpf and add normalization to the preemp

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KubaPro010
2025-03-26 19:26:40 +01:00
parent 6a83a18cf4
commit 2e36f34b4a
5 changed files with 9 additions and 30 deletions
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10
src/fm95.c
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@@ -414,10 +414,6 @@ int main(int argc, char **argv) {
ResistorCapacitor preemp_l, preemp_r;
init_preemphasis(&preemp_l, preemphasis_tau, sample_rate);
init_preemphasis(&preemp_r, preemphasis_tau, sample_rate);
ResistorCapacitor lpf_l, lpf_r;
init_rc_lpf(&lpf_l, 15000, sample_rate);
init_rc_lpf(&lpf_r, 15000, sample_rate);
// #endregion
signal(SIGINT, stop);
@@ -473,10 +469,8 @@ int main(int argc, char **argv) {
float current_rds2_in = rds2_in[i];
float current_sca_in = sca_in[i];
float ready_l = apply_preemphasis(&preemp_l, l_in)*2;
float ready_r = apply_preemphasis(&preemp_r, r_in)*2;
ready_l = apply_rc_lpf(&lpf_l, ready_l);
ready_r = apply_rc_lpf(&lpf_r, ready_r);
float ready_l = apply_preemphasis(&preemp_l, l_in);
float ready_r = apply_preemphasis(&preemp_r, r_in);
ready_l = hard_clip(ready_l*audio_volume, clipper_threshold);
ready_r = hard_clip(ready_r*audio_volume, clipper_threshold);