From 8674c8bd80f775e3c43af64be418546f044fc840 Mon Sep 17 00:00:00 2001 From: KubaPro010 Date: Wed, 1 Jan 2025 02:40:44 +0100 Subject: [PATCH] that didn't work --- src/ssb_stereo_coder.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/src/ssb_stereo_coder.c b/src/ssb_stereo_coder.c index 6843f8e..604791c 100644 --- a/src/ssb_stereo_coder.c +++ b/src/ssb_stereo_coder.c @@ -126,8 +126,6 @@ int main() { init_hilbert(&hilbert); DelayLine monoDelay; init_delay_line(&monoDelay, 99); - LowPassFilter ssb_lpf; - init_low_pass_filter(&ssb_lpf, 38150, SAMPLE_RATE); #ifdef PREEMPHASIS Emphasis preemp_l, preemp_r; init_emphasis(&preemp_l, PREEMPHASIS_TAU, SAMPLE_RATE); @@ -190,11 +188,11 @@ int main() { float stereo = (current_left_input - current_right_input) / 2.0f; // Also Stereo to Mono but a bit diffrent float stereo_i, stereo_q; apply_hilbert(&hilbert, stereo, &stereo_i, &stereo_q); // I/Q, the Quadrature data is 90 degrees apart from the In-phase data - float lsb = (stereo_i*cos38-stereo_q*(sin38*0.75f)); // Compute LSB, as the Hilbert isn't perfect, i'll have to a bit silence down the Q carrier in order to make it better, also, it is just perfect as FM Stereo LSB shouldn't be fully LSB + float lsb = (stereo_i*cos38-stereo_q*(sin38*0.73f)); // Compute LSB, as the Hilbert isn't perfect, i'll have to a bit silence down the Q carrier in order to make it better, also, it is just perfect as FM Stereo LSB shouldn't be fully LSB mpx[i] = delay_line(&monoDelay, mono) * MONO_VOLUME + pilot * PILOT_VOLUME + - apply_low_pass_filter(&ssb_lpf, lsb)/6 *STEREO_VOLUME; + lsb *STEREO_VOLUME; } if (pa_simple_write(output_device, mpx, sizeof(mpx), NULL) < 0) {