From eb4ec561ec486d94e4c3120a6a6a516a3093073f Mon Sep 17 00:00:00 2001
From: KubaPro010 <kuba.pro010@gmail.com>
Date: Sun, 15 Feb 2026 21:49:19 +0100
Subject: [PATCH] flip sign

---
 modulation/stereo_encoder.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modulation/stereo_encoder.c b/modulation/stereo_encoder.c
index 662c6fc..6c21e63 100644
--- a/modulation/stereo_encoder.c
+++ b/modulation/stereo_encoder.c
@@ -37,7 +37,7 @@ float stereo_encode(StereoEncoder* st, uint8_t enabled, float left, float right,
 
     *audio = (mid*half_audio);
     if(st->stereo_hilbert) {
-        float stereo = (crealf(stereo_hilbert) * signalx2) + (cimagf(stereo_hilbert) * signalx2cos);
+        float stereo = (crealf(stereo_hilbert) * signalx2) - (cimagf(stereo_hilbert) * signalx2cos);
         *audio += (stereo * half_audio);
     } else *audio += ((side*signalx2) * half_audio);
     return (signalx1*st->pilot_volume);