diff --git a/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Hardware/SoundOuput/AY38912.cs b/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Hardware/SoundOuput/AY38912.cs
index f003ddd6f2..62c3d7829b 100644
--- a/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Hardware/SoundOuput/AY38912.cs
+++ b/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Hardware/SoundOuput/AY38912.cs
@@ -2,8 +2,6 @@
 using BizHawk.Common;
 using BizHawk.Emulation.Common;
 using System;
-using System.Collections.Generic;
-using System.Linq;
 
 namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
 {
@@ -69,9 +67,6 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
 
         public void UpdateSound(int currentFrameCycle)
         {
-            //if (currentFrameCycle >= _tStatesPerFrame)
-                //currentFrameCycle = _tStatesPerFrame;
-
             for (int i = 0; i < (currentFrameCycle / AY_SAMPLE_RATE) - _AYCount; i++)
             {
                 Update();
@@ -113,11 +108,7 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
             
             // the stereo _samples buffer should already have been processed as a part of
             // ISoundProvider at the end of the last frame
-            //_samples = new short[_samplesPerFrame * 2];
-            //_nsamp = _samplesPerFrame;
             _sampleCounter = 0;
-
-            //Init(44100, _tStatesPerFrame);
         }
 
         public void EndFrame()
@@ -447,15 +438,25 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
 
         private void EndSampleAY()
         {
-            averagedChannelSamples[0] = (short)((averagedChannelSamples[ChannelLeft] + averagedChannelSamples[ChannelCenter]) / soundSampleCounter);
-            averagedChannelSamples[1] = (short)((averagedChannelSamples[ChannelRight] + averagedChannelSamples[ChannelCenter]) / soundSampleCounter);
+            //averagedChannelSamples[0] = (short)((averagedChannelSamples[ChannelLeft] + 
+               // averagedChannelSamples[ChannelCenter] + 
+               // averagedChannelSamples[ChannelRight]) 
+               // / soundSampleCounter);
+
+           // averagedChannelSamples[1] = (short)((averagedChannelSamples[ChannelLeft] +
+               // averagedChannelSamples[ChannelCenter] +
+               // averagedChannelSamples[ChannelRight])
+               // / soundSampleCounter);
+
+            averagedChannelSamples[0] = (short)((averagedChannelSamples[ChannelLeft] + averagedChannelSamples[ChannelCenter] / 1.5) / soundSampleCounter);
+            averagedChannelSamples[1] = (short)((averagedChannelSamples[ChannelRight] + averagedChannelSamples[ChannelCenter] / 1.5) / soundSampleCounter);
             
             soundSampleCounter = 0;
         }
 
         private void SampleAY()
         {
-            int ah;
+            int ah;            
 
             ah = regs[AY_ENABLE];
 
diff --git a/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Hardware/SoundOuput/Buzzer.cs b/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Hardware/SoundOuput/Buzzer.cs
index 0e98c67c29..667fe519be 100644
--- a/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Hardware/SoundOuput/Buzzer.cs
+++ b/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Hardware/SoundOuput/Buzzer.cs
@@ -236,7 +236,7 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
                     if (_tapeMode)
                         samples[sampleIndex++] = pulse.State ? (short)(short.MaxValue / 6) : (short)0;
                     else
-                        samples[sampleIndex++] = pulse.State ? (short)(short.MaxValue / 2) : (short)0;
+                        samples[sampleIndex++] = pulse.State ? (short)(short.MaxValue / 3) : (short)0;
                 }                   
 
                 currentEnd += pulse.Length;
diff --git a/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Machine/SpectrumBase.cs b/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Machine/SpectrumBase.cs
index 258af9f579..bc4f9952bf 100644
--- a/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Machine/SpectrumBase.cs
+++ b/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Machine/SpectrumBase.cs
@@ -146,7 +146,7 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
 
             PollInput();
 
-            while (CurrentFrameCycle < ULADevice.FrameLength) // UlaFrameCycleCount)
+            while (CurrentFrameCycle < ULADevice.FrameLength)
             {
                 // check for interrupt
                 ULADevice.CheckForInterrupt(CurrentFrameCycle);
@@ -157,8 +157,10 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
                 // update AY
                 if (_renderSound)
                 {
-                    if (AYDevice != null)
-                        AYDevice.UpdateSound(CurrentFrameCycle);
+                    if (AYDevice != null && CPU.RegPC != 1523)
+                    {
+                        AYDevice.UpdateSound(CurrentFrameCycle);                            
+                    }                        
                 }
             }
 
diff --git a/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/SoundProviderMixer.cs b/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/SoundProviderMixer.cs
index 1b2e37b835..303eda38b7 100644
--- a/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/SoundProviderMixer.cs
+++ b/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/SoundProviderMixer.cs
@@ -45,6 +45,22 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
             EqualizeVolumes();
         }
 
+        public SoundProviderMixer(short maxVolume, params ISoundProvider[] soundProviders)
+        {
+            SoundProviders = new List<Provider>();
+
+            foreach (var s in soundProviders)
+            {
+                SoundProviders.Add(new Provider
+                {
+                    SoundProvider = s,
+                    MaxVolume = maxVolume,
+                });
+            }
+
+            EqualizeVolumes();
+        }
+
         public void AddSource(ISoundProvider source)
         {
             SoundProviders.Add(new Provider
@@ -56,6 +72,17 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
             EqualizeVolumes();
         }
 
+        public void AddSource(ISoundProvider source, short maxVolume)
+        {
+            SoundProviders.Add(new Provider
+            {
+                SoundProvider = source,
+                MaxVolume = maxVolume
+            });
+
+            EqualizeVolumes();
+        }
+
         public void DisableSource(ISoundProvider source)
         {
             var sp = SoundProviders.Where(a => a.SoundProvider == source);
diff --git a/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/ZXSpectrum.cs b/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/ZXSpectrum.cs
index cb294a8146..edab502824 100644
--- a/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/ZXSpectrum.cs
+++ b/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/ZXSpectrum.cs
@@ -99,7 +99,7 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
             ser.Register<IDisassemblable>(_cpu);
             ser.Register<IVideoProvider>(_machine.ULADevice);
 
-            SoundMixer = new SoundProviderMixer((ISoundProvider)_machine.BuzzerDevice);
+            SoundMixer = new SoundProviderMixer((int)(32767 / 10), (ISoundProvider)_machine.BuzzerDevice);
             if (_machine.AYDevice != null)
                 SoundMixer.AddSource(_machine.AYDevice);