From 89b13280de93ad2131c12dc234fa65cd10855996 Mon Sep 17 00:00:00 2001
From: thmueller64 <64359888+thmueller64@users.noreply.github.com>
Date: Sat, 3 Oct 2020 07:05:55 +0200
Subject: [PATCH] LB302: Use consistent cutoff frequency on mulitple sample
 rates (#5618)

---
 plugins/lb302/lb302.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/plugins/lb302/lb302.cpp b/plugins/lb302/lb302.cpp
index cc671749d..e9a518e3d 100644
--- a/plugins/lb302/lb302.cpp
+++ b/plugins/lb302/lb302.cpp
@@ -74,7 +74,7 @@
 
 
 //#define engine::mixer()->processingSampleRate() 44100.0f
-
+const float sampleRateCutoff = 44100.0f;
 
 extern "C"
 {
@@ -228,8 +228,11 @@ void lb302Filter3Pole::envRecalc()
 	// e0 is adjusted for Hz and doesn't need ENVINC
 	w = vcf_e0 + vcf_c0;
 	k = (fs->cutoff > 0.975)?0.975:fs->cutoff;
+    // sampleRateCutoff should not be changed to anything dynamic that is outside the
+    // scope of lb302 (like e.g. the mixers sample rate) as this changes the filters cutoff
+    // behavior without any modification to its controls.
 	kfco = 50.f + (k)*((2300.f-1600.f*(fs->envmod))+(w) *
-	                   (700.f+1500.f*(k)+(1500.f+(k)*(Engine::mixer()->processingSampleRate()/2.f-6000.f)) *
+	                   (700.f+1500.f*(k)+(1500.f+(k)*(sampleRateCutoff/2.f-6000.f)) *
 	                   (fs->envmod)) );
 	//+iacc*(.3+.7*kfco*kenvmod)*kaccent*kaccurve*2000