diff --git a/Core/HLE/sceSas.cpp b/Core/HLE/sceSas.cpp
index 7bca18bdd8..b8f01530fc 100644
--- a/Core/HLE/sceSas.cpp
+++ b/Core/HLE/sceSas.cpp
@@ -243,8 +243,7 @@ static u32 _sceSasCore(u32 core, u32 outAddr) {
 
 	__SasEnqueueMix(outAddr);
 
-	// Actual delay time seems to between 240 and 1000 us, based on grain and possibly other factors.
-	return hleLogSuccessI(SCESAS, hleDelayResult(0, "sas core", 240));
+	return hleLogSuccessI(SCESAS, hleDelayResult(0, "sas core", sas->EstimateMixUs()));
 }
 
 // Another way of running the mixer, the inoutAddr should be both input and output
@@ -260,8 +259,7 @@ static u32 _sceSasCoreWithMix(u32 core, u32 inoutAddr, int leftVolume, int right
 
 	__SasEnqueueMix(inoutAddr, inoutAddr, leftVolume, rightVolume);
 
-	// Actual delay time seems to between 240 and 1000 us, based on grain and possibly other factors.
-	return hleLogSuccessI(SCESAS, hleDelayResult(0, "sas core", 240));
+	return hleLogSuccessI(SCESAS, hleDelayResult(0, "sas core", sas->EstimateMixUs()));
 }
 
 static u32 sceSasSetVoice(u32 core, int voiceNum, u32 vagAddr, int size, int loop) {
diff --git a/Core/HW/SasAudio.cpp b/Core/HW/SasAudio.cpp
index 1d383a369a..78baaf39ee 100644
--- a/Core/HW/SasAudio.cpp
+++ b/Core/HW/SasAudio.cpp
@@ -408,6 +408,20 @@ void SasInstance::SetGrainSize(int newGrainSize) {
 	resampleBuffer = new s16[grainSize * 4 + 3];
 }
 
+int SasInstance::EstimateMixUs() {
+	int voicesPlayingCount = 0;
+
+	for (int v = 0; v < PSP_SAS_VOICES_MAX; v++) {
+		SasVoice &voice = voices[v];
+		if (!voice.playing || voice.paused)
+			continue;
+		voicesPlayingCount++;
+	}
+
+	// Each voice costs extra time, and each byte of grain costs extra time.
+	return 20 + voicesPlayingCount * 68 + (grainSize * 60) / 100;
+}
+
 void SasVoice::ReadSamples(s16 *output, int numSamples) {
 	// Read N samples into the resample buffer. Could do either PCM or VAG here.
 	switch (type) {
diff --git a/Core/HW/SasAudio.h b/Core/HW/SasAudio.h
index 07257027ff..fd4283e2f6 100644
--- a/Core/HW/SasAudio.h
+++ b/Core/HW/SasAudio.h
@@ -278,6 +278,7 @@ public:
 	void ClearGrainSize();
 	void SetGrainSize(int newGrainSize);
 	int GetGrainSize() const { return grainSize; }
+	int EstimateMixUs();
 
 	int maxVoices;
 	int sampleRate;