diff --git a/source/Mockingboard.cpp b/source/Mockingboard.cpp
index 6047f912..1dadd8ca 100644
--- a/source/Mockingboard.cpp
+++ b/source/Mockingboard.cpp
@@ -857,7 +857,7 @@ static BYTE __stdcall MB_Read(WORD PC, WORD nAddr, BYTE bWrite, BYTE nValue, ULO
 
 		bool bAccessedDevice = (CS & 3) ? true : false;
 
-		bool CS_SSI263 = !(nAddr & 0x80) && (nAddr & 0x60);			// SSI263 at $Cn2x and/or $Cn4x
+		bool CS_SSI263 = !(nAddr & 0x10) && (nAddr & 0x60) && !(nAddr & 0x80);				// SSI263 at $Cn2x and/or $Cn4x
 
 		if (g_phasorMode == PH_Phasor && CS_SSI263)					// NB. Mockingboard mode: SSI263.bit7 not readable
 		{
diff --git a/source/SSI263.cpp b/source/SSI263.cpp
index 26617318..9e689cbb 100644
--- a/source/SSI263.cpp
+++ b/source/SSI263.cpp
@@ -312,6 +312,15 @@ void SSI263::Play(unsigned int nPhoneme)
 			return;
 	}
 
+	if (!m_isVotraxPhoneme)
+	{
+		const DWORD volume = AMPLITUDE_MASK - (m_ctrlArtAmp & AMPLITUDE_MASK);	// Invert so that: 0=max, 15=min
+		SSI263SingleVoice.nVolume = NewVolume(volume*volume, AMPLITUDE_MASK*AMPLITUDE_MASK);	// logarithmic, but amplitude<8 can't be heard
+		HRESULT hr = SSI263SingleVoice.lpDSBvoice->SetVolume(SSI263SingleVoice.nVolume);
+		if (hr != S_OK)
+			LogFileOutput("SSI263::Play: SetVolume(%d) res = %08X\n", SSI263SingleVoice.nVolume, hr);
+	}
+
 	if (m_dbgFirst)
 	{
 		m_dbgStartTime = g_nCumulativeCycles;
@@ -328,9 +337,6 @@ void SSI263::Play(unsigned int nPhoneme)
 
 	bool bPause = false;
 
-	if (!m_isVotraxPhoneme && (m_ctrlArtAmp & AMPLITUDE_MASK) == 0)
-		nPhoneme = 0;
-
 	if (nPhoneme == 1)
 		nPhoneme = 2;	// Missing this sample, so map to phoneme-2