From f5877abafee43438f49a6e1a472139c1651210da Mon Sep 17 00:00:00 2001
From: LTVA1 <87536432+LTVA1@users.noreply.github.com>
Date: Sat, 10 Aug 2024 23:45:12 +0300
Subject: [PATCH] add distortion to wave channel as well...

---
 src/engine/platform/sound/sid3.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/engine/platform/sound/sid3.c b/src/engine/platform/sound/sid3.c
index 3ee185f2e..d7057553f 100644
--- a/src/engine/platform/sound/sid3.c
+++ b/src/engine/platform/sound/sid3.c
@@ -2978,6 +2978,19 @@ int32_t sid3_process_wave_channel_filters_block(sid3_wavetable_chan* ch)
                     break;
             }
 
+            if(ch->filt.filt[i].distortion_level > 0)
+            {
+                if(Vo > 0.0)
+                {
+                    Vo = (tanh((Vo / 39767.0) * ch->filt.filt[i].distortion_multiplier) / ch->filt.filt[i].tanh_distortion_multiplier) * 39767.0;
+                }
+                else
+                {
+                    double ahh = (Vo / 39767.0) * ch->filt.filt[i].distortion_multiplier;
+                    Vo = ((exp(ahh) - 1.0) / ch->filt.filt[i].tanh_distortion_multiplier) * 39767.0;
+                }
+            }
+
             ch->filt.filt[i].output = Vo * ch->filt.filt[i].output_volume / 0xff;
         }
         else