From 0e9ce1aa83b99058a4c1b75035f1a0102ff691ef Mon Sep 17 00:00:00 2001
From: Devin Braune <github@devinbraune.de>
Date: Thu, 14 Oct 2021 20:18:54 +0200
Subject: Fix cone angle calculation (#605)

---
 alc/alu.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/alc/alu.cpp b/alc/alu.cpp
index e28d2a53..b317a40f 100644
--- a/alc/alu.cpp
+++ b/alc/alu.cpp
@@ -1386,7 +1386,7 @@ void CalcAttnSourceParams(Voice *voice, const VoiceProps *props, const ContextBa
     /* Calculate directional soundcones */
     if(directional && props->InnerAngle < 360.0f)
     {
-        const float Angle{Rad2Deg(std::acos(Direction.dot_product(ToSource)) * ConeScale * -2.0f)};
+        const float Angle{Rad2Deg(std::acos(-Direction.dot_product(ToSource)) * ConeScale * 2.0f)};
 
         float ConeGain, ConeHF;
         if(!(Angle > props->InnerAngle))
-- 
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