From 1592e2c800aec472a2ca6f62bb605ea41b238a18 Mon Sep 17 00:00:00 2001
From: ronso0 <ronso0@mixxx.org>
Date: Tue, 10 Dec 2024 14:18:52 +0100
Subject: [PATCH] S4 Mk3: eliminate scratch drift when using engine.scratch..
 functions

---
 res/controllers/Traktor-Kontrol-S4-MK3.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/res/controllers/Traktor-Kontrol-S4-MK3.js b/res/controllers/Traktor-Kontrol-S4-MK3.js
index 410c78866004..8bcd4d84fef5 100644
--- a/res/controllers/Traktor-Kontrol-S4-MK3.js
+++ b/res/controllers/Traktor-Kontrol-S4-MK3.js
@@ -2491,7 +2491,8 @@ class S4Mk3Deck extends Deck {
                 }
 
                 const currentSpeed = (value - oldValue)/(timestamp - oldTimestamp);
-                if ((currentSpeed <= 0) === (speed <= 0)) {
+                if ((currentSpeed < 0) === (speed < 0) ||
+                        ((currentSpeed > 0) === (speed > 0))) {
                     speed = (speed + currentSpeed)/2;
                 } else {
                     speed = currentSpeed;