diff --git a/BizHawk.Emulation.Cores/Consoles/Atari/2600/Tia/Tia.Audio.cs b/BizHawk.Emulation.Cores/Consoles/Atari/2600/Tia/Tia.Audio.cs
index 42a53b9204..f87ff802cf 100644
--- a/BizHawk.Emulation.Cores/Consoles/Atari/2600/Tia/Tia.Audio.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Atari/2600/Tia/Tia.Audio.cs
@@ -1,4 +1,5 @@
-using BizHawk.Common;
+using System;
+using BizHawk.Common;
 
 namespace BizHawk.Emulation.Cores.Atari.Atari2600
 {
@@ -16,29 +17,29 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 			public byte AUDV = 0;
 
 			// 2 state counter
-			private bool _sr1 = true;
+			private bool sr1 = true;
 
 			// 4 bit shift register
-			private int _sr4 = 0x0f;
+			private int sr4 = 0x0f;
 
 			// 5 bit shift register
-			private int _sr5 = 0x1f;
+			private int sr5 = 0x1f;
 
 			// 3 state counter
-			private int _sr3 = 2;
+			private int sr3 = 2;
 
 			// counter based off AUDF
-			private byte _freqcnt;
+			private byte freqcnt;
 
 			// latched audio value
-			private bool _on = true;
+			private bool on = true;
 
 			private bool Run3()
 			{
-				_sr3++;
-				if (_sr3 == 3)
+				sr3++;
+				if (sr3 == 3)
 				{
-					_sr3 = 0;
+					sr3 = 0;
 					return true;
 				}
 
@@ -47,46 +48,46 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 
 			private bool Run4()
 			{
-				bool ret = (_sr4 & 1) != 0;
-				bool c = (_sr4 & 1) != 0 ^ (_sr4 & 2) != 0;
-				_sr4 = (_sr4 >> 1) | (c ? 8 : 0);
+				bool ret = (sr4 & 1) != 0;
+				bool c = (sr4 & 1) != 0 ^ (sr4 & 2) != 0;
+				sr4 = (sr4 >> 1) | (c ? 8 : 0);
 				return ret;
 			}
 
 			private bool Run5()
 			{
-				bool ret = (_sr5 & 1) != 0;
-				bool c = (_sr5 & 1) != 0 ^ (_sr5 & 4) != 0;
-				_sr5 = (_sr5 >> 1) | (c ? 16 : 0);
+				bool ret = (sr5 & 1) != 0;
+				bool c = (sr5 & 1) != 0 ^ (sr5 & 4) != 0;
+				sr5 = (sr5 >> 1) | (c ? 16 : 0);
 				return ret;
 			}
 
 			private bool One4()
 			{
-				bool ret = (_sr4 & 1) != 0;
-				_sr4 = (_sr4 >> 1) | 8;
+				bool ret = (sr4 & 1) != 0;
+				sr4 = (sr4 >> 1) | 8;
 				return ret;
 			}
 
 			private bool One5()
 			{
-				bool ret = (_sr5 & 1) != 0;
-				_sr5 = (_sr5 >> 1) | 16;
+				bool ret = (sr5 & 1) != 0;
+				sr5 = (sr5 >> 1) | 16;
 				return ret;
 			}
 
 			private bool Run1()
 			{
-				_sr1 = !_sr1;
-				return !_sr1;
+				sr1 = !sr1;
+				return !sr1;
 			}
 
 			private bool Run9()
 			{
-				bool ret = (_sr4 & 1) != 0;
-				bool c = (_sr5 & 1) != 0 ^ (_sr4 & 1) != 0;
-				_sr4 = (_sr4 >> 1) | ((_sr5 & 1) != 0 ? 8 : 0);
-				_sr5 = (_sr5 >> 1) | (c ? 16 : 0);
+				bool ret = (sr4 & 1) != 0;
+				bool c = (sr5 & 1) != 0 ^ (sr4 & 1) != 0;
+				sr4 = (sr4 >> 1) | ((sr5 & 1) != 0 ? 8 : 0);
+				sr5 = (sr5 >> 1) | (c ? 16 : 0);
 				return ret;
 			}
 
@@ -96,28 +97,28 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 			/// <returns>16 bit audio sample</returns>
 			public short Cycle()
 			{
-				if (++_freqcnt == AUDF)
+				if (++freqcnt == AUDF)
 				{
-					_freqcnt = 0;
+					freqcnt = 0;
 					switch (AUDC)
 					{
 						case 0x00:
 						case 0x0b:
 							// Both have a 1 s
 							One5();
-							_on = One4();
+							on = One4();
 							break;
 
 						case 0x01:
 							// Both run, but the 5 bit is ignored
-							_on = Run4();
+							on = Run4();
 							Run5();
 							break;
 
 						case 0x02:
-							if ((_sr5 & 0x0f) == 0 || (_sr5 & 0x0f) == 0x0f)
+							if ((sr5 & 0x0f) == 0 || (sr5 & 0x0f) == 0x0f)
 							{
-								_on = Run4();
+								on = Run4();
 								break;
 							}
 
@@ -127,7 +128,7 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 						case 0x03:
 							if (Run5())
 							{
-								_on = Run4();
+								on = Run4();
 							}
 
 							break;
@@ -135,26 +136,26 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 						case 0x04:
 							Run5();
 							One4();
-							_on = Run1();
+							on = Run1();
 							break;
 
 						case 0x05:
 							One5();
 							Run4();
-							_on = Run1();
+							on = Run1();
 							break;
 
 						case 0x06:
 						case 0x0a:
 							Run4(); // ???
 							Run5();
-							if ((_sr5 & 0x0f) == 0)
+							if ((sr5 & 0x0f) == 0)
 							{
-								_on = false;
+								on = false;
 							}
-							else if ((_sr5 & 0x0f) == 0x0f)
+							else if ((sr5 & 0x0f) == 0x0f)
 							{
-								_on = true;
+								on = true;
 							}
 
 							break;
@@ -162,16 +163,16 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 						case 0x07:
 						case 0x09:
 							Run4(); // ???
-							_on = Run5();
+							on = Run5();
 							break;
 						case 0x08:
-							_on = Run9();
+							on = Run9();
 							break;
 						case 0x0c:
 						case 0x0d:
 							if (Run3())
 							{
-								_on = Run1();
+								on = Run1();
 							}
 
 							break;
@@ -192,7 +193,7 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 					}
 				}
 
-				return (short)(_on ? AUDV * 1092 : 0);
+				return (short)(on ? AUDV * 1092 : 0);
 			}
 
 			public void SyncState(Serializer ser)
@@ -200,12 +201,12 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 				ser.Sync("AUDC", ref AUDC);
 				ser.Sync("AUDF", ref AUDF);
 				ser.Sync("AUDV", ref AUDV);
-				ser.Sync("sr1", ref _sr1);
-				ser.Sync("sr3", ref _sr3);
-				ser.Sync("sr4", ref _sr4);
-				ser.Sync("sr5", ref _sr5);
-				ser.Sync("freqcnt", ref _freqcnt);
-				ser.Sync("on", ref _on);
+				ser.Sync("sr1", ref sr1);
+				ser.Sync("sr3", ref sr3);
+				ser.Sync("sr4", ref sr4);
+				ser.Sync("sr5", ref sr5);
+				ser.Sync("freqcnt", ref freqcnt);
+				ser.Sync("on", ref on);
 			}
 		}
 	}