From e006ab5b2d05eb43e732b7c85b16556b6623d9df Mon Sep 17 00:00:00 2001
From: "Unknown W. Brackets" <checkins@unknownbrackets.org>
Date: Sun, 16 Feb 2014 18:39:27 -0800
Subject: [PATCH] Don't read the first 32 samples after keyon.

The way I'm approximating this is ugly...
---
 Core/HW/SasAudio.cpp | 7 ++++++-
 Core/HW/SasAudio.h   | 4 ++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/Core/HW/SasAudio.cpp b/Core/HW/SasAudio.cpp
index 22e5776889..3c7781e821 100644
--- a/Core/HW/SasAudio.cpp
+++ b/Core/HW/SasAudio.cpp
@@ -468,7 +468,12 @@ void SasInstance::MixVoice(SasVoice &voice) {
 			numSamples = grainSize * 4;
 		}
 
-		voice.ReadSamples(resampleBuffer + 2, numSamples);
+		// This feels a bit hacky.  The first 32 samples after a keyon are 0s.
+		if (voice.envelope.NeedsKeyOn()) {
+			voice.ReadSamples(resampleBuffer + 2 + 32, numSamples - 32);
+		} else {
+			voice.ReadSamples(resampleBuffer + 2, numSamples);
+		}
 
 		// Smoothness HACKERY
 		resampleBuffer[2 + numSamples] = resampleBuffer[2 + numSamples - 1];
diff --git a/Core/HW/SasAudio.h b/Core/HW/SasAudio.h
index a0d7eeba94..2daf6104cf 100644
--- a/Core/HW/SasAudio.h
+++ b/Core/HW/SasAudio.h
@@ -146,9 +146,13 @@ public:
 	int GetHeight() const {
 		return height_ > (s64)PSP_SAS_ENVELOPE_HEIGHT_MAX ? PSP_SAS_ENVELOPE_HEIGHT_MAX : height_;
 	}
+	bool NeedsKeyOn() const {
+		return state_ == STATE_KEYON;
+	}
 	bool HasEnded() const {
 		return state_ == STATE_OFF;
 	}
+
 	int attackRate;
 	int decayRate;
 	int sustainRate;