From 03ca50fa70268644b0c57ec7c36638f5edbb7909 Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Tue, 15 Jan 2008 18:29:21 -0800
Subject: Use the previous low-pass filter again, as it seems to match the
 intended output better

---
 Alc/ALu.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/Alc/ALu.c b/Alc/ALu.c
index 3b9e0611..3e9387bb 100644
--- a/Alc/ALu.c
+++ b/Alc/ALu.c
@@ -217,9 +217,13 @@ static __inline ALfloat aluComputeDrySample(ALsource *source, ALfloat DryGainHF,
 {
     if(DryGainHF < 1.0f)
     {
-        ALfloat u = sample + source->LastDrySample;
-        ALfloat v = sample - source->LastDrySample;
-        sample = (u + (v*DryGainHF)) * 0.5;
+        if(DryGainHF > 0.0f)
+        {
+            sample *= DryGainHF;
+            sample += source->LastDrySample * (1.0f-DryGainHF);
+        }
+        else
+            sample = 0.0f;
     }
 
     source->LastDrySample = sample;
@@ -230,9 +234,13 @@ static __inline ALfloat aluComputeWetSample(ALsource *source, ALfloat WetGainHF,
 {
     if(WetGainHF < 1.0f)
     {
-        ALfloat u = sample + source->LastWetSample;
-        ALfloat v = sample - source->LastWetSample;
-        sample = (u + (v*WetGainHF)) * 0.5;
+        if(WetGainHF > 0.0f)
+        {
+            sample *= WetGainHF;
+            sample += source->LastWetSample * (1.0f-WetGainHF);
+        }
+        else
+            sample = 0.0f;
     }
 
     source->LastWetSample = sample;
-- 
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