diff --git a/src/BizHawk.Emulation.Cores/Consoles/Sega/SMS/SMS.ISoundProvider.cs b/src/BizHawk.Emulation.Cores/Consoles/Sega/SMS/SMS.ISoundProvider.cs
index d89df311f8..f97b5bf2f9 100644
--- a/src/BizHawk.Emulation.Cores/Consoles/Sega/SMS/SMS.ISoundProvider.cs
+++ b/src/BizHawk.Emulation.Cores/Consoles/Sega/SMS/SMS.ISoundProvider.cs
@@ -73,7 +73,7 @@ namespace BizHawk.Emulation.Cores.Sega.MasterSystem
 				int len = samples.Length;
 				for (int i = 0; i < len; i++)
 				{
-					short fmSample = fmSamples[i];
+					short fmSample = (short)(fmSamples[i] << 1);
 					samples[i] = (short)(samples[i] + fmSample);
 				}
 			}
diff --git a/src/BizHawk.Emulation.Cores/Sound/SN76489sms.cs b/src/BizHawk.Emulation.Cores/Sound/SN76489sms.cs
index 95d397abcc..7a0a065563 100644
--- a/src/BizHawk.Emulation.Cores/Sound/SN76489sms.cs
+++ b/src/BizHawk.Emulation.Cores/Sound/SN76489sms.cs
@@ -8,6 +8,8 @@ namespace BizHawk.Emulation.Cores.Components
 		public int current_sample_L;
 		public int current_sample_R;
 
+		int aud_scale = 21;
+
 		public SN76489sms()
 		{
 			Reset();
@@ -235,21 +237,21 @@ namespace BizHawk.Emulation.Cores.Components
 				}
 
 				// now calculate the volume of each channel and add them together
-				current_sample_L = (A_L ? (A_up ? LogScale[Chan_vol[0]] * 42 : 0) : 0);
+				current_sample_L = (A_L ? (A_up ? LogScale[Chan_vol[0]] * aud_scale : 0) : 0);
 
-				current_sample_L += (B_L ? (B_up ? LogScale[Chan_vol[1]] * 42 : 0) : 0);
+				current_sample_L += (B_L ? (B_up ? LogScale[Chan_vol[1]] * aud_scale : 0) : 0);
 
-				current_sample_L += (C_L ? (C_up ? LogScale[Chan_vol[2]] * 42 : 0) : 0);
+				current_sample_L += (C_L ? (C_up ? LogScale[Chan_vol[2]] * aud_scale : 0) : 0);
 
-				current_sample_L += (noise_L ? (noise_bit ? LogScale[Chan_vol[3]] * 42 : 0) : 0);
+				current_sample_L += (noise_L ? (noise_bit ? LogScale[Chan_vol[3]] * aud_scale : 0) : 0);
 
-				current_sample_R = (A_R ? (A_up ? LogScale[Chan_vol[0]] * 42 : 0) : 0);
+				current_sample_R = (A_R ? (A_up ? LogScale[Chan_vol[0]] * aud_scale : 0) : 0);
 
-				current_sample_R += (B_R ? (B_up ? LogScale[Chan_vol[1]] * 42 : 0) : 0);
+				current_sample_R += (B_R ? (B_up ? LogScale[Chan_vol[1]] * aud_scale : 0) : 0);
 
-				current_sample_R += (C_R ? (C_up ? LogScale[Chan_vol[2]] * 42 : 0) : 0);
+				current_sample_R += (C_R ? (C_up ? LogScale[Chan_vol[2]] * aud_scale : 0) : 0);
 
-				current_sample_R += (noise_R ? (noise_bit ? LogScale[Chan_vol[3]] * 42 : 0) : 0);
+				current_sample_R += (noise_R ? (noise_bit ? LogScale[Chan_vol[3]] * aud_scale : 0) : 0);
 			}
 		}
 	}