From f72c4130a9cd78d1a047a11d7073262bcc58ea4d Mon Sep 17 00:00:00 2001
From: LTVA1 <87536432+LTVA1@users.noreply.github.com>
Date: Sun, 4 Aug 2024 09:07:19 +0300
Subject: [PATCH] filter: do not invert signal?

---
 src/engine/platform/sound/sid3.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/engine/platform/sound/sid3.c b/src/engine/platform/sound/sid3.c
index d766c264d..27730e7ee 100644
--- a/src/engine/platform/sound/sid3.c
+++ b/src/engine/platform/sound/sid3.c
@@ -2847,9 +2847,9 @@ int32_t sid3_process_filters_block(sid3_channel* ch)
 
             float dVbp = (ch->filt.filt[i].w0_ceil_1 * ch->filt.filt[i].Vhp);
             float dVlp = (ch->filt.filt[i].w0_ceil_1 * ch->filt.filt[i].Vbp);
-            ch->filt.filt[i].Vbp -= dVbp;
-            ch->filt.filt[i].Vlp -= dVlp;
-            ch->filt.filt[i].Vhp = (ch->filt.filt[i].Vbp * ch->filt.filt[i]._1024_div_Q) - ch->filt.filt[i].Vlp - Vi;
+            ch->filt.filt[i].Vbp += dVbp;
+            ch->filt.filt[i].Vlp += dVlp;
+            ch->filt.filt[i].Vhp = Vi - ch->filt.filt[i].Vlp - (ch->filt.filt[i].Vbp * ch->filt.filt[i]._1024_div_Q);
 
             float Vo;