diff --git a/src/BizHawk.Emulation.DiscSystem/DiscFormats/Blobs/Blob_RawFile.cs b/src/BizHawk.Emulation.DiscSystem/DiscFormats/Blobs/Blob_RawFile.cs
index 3c3ba957a7..483c22cd5d 100644
--- a/src/BizHawk.Emulation.DiscSystem/DiscFormats/Blobs/Blob_RawFile.cs
+++ b/src/BizHawk.Emulation.DiscSystem/DiscFormats/Blobs/Blob_RawFile.cs
@@ -17,7 +17,7 @@ namespace BizHawk.Emulation.DiscSystem
 		private string physicalPath;
 		private long length;
 
-		public long Offset = 0;
+		public readonly long Offset = 0;
 
 		private BufferedStream fs;
 		public void Dispose()
diff --git a/src/BizHawk.Emulation.DiscSystem/DiscFormats/Blobs/Blob_WaveFile.cs b/src/BizHawk.Emulation.DiscSystem/DiscFormats/Blobs/Blob_WaveFile.cs
index a5e63397d3..a446d1214d 100644
--- a/src/BizHawk.Emulation.DiscSystem/DiscFormats/Blobs/Blob_WaveFile.cs
+++ b/src/BizHawk.Emulation.DiscSystem/DiscFormats/Blobs/Blob_WaveFile.cs
@@ -23,43 +23,6 @@ namespace BizHawk.Emulation.DiscSystem
 		{
 		}
 
-		private class Blob_RawFile : IBlob
-		{
-			public string PhysicalPath
-			{
-				get => physicalPath;
-				set
-				{
-					physicalPath = value;
-					length = new FileInfo(physicalPath).Length;
-				}
-			}
-
-			private string physicalPath;
-			private long length;
-
-			public readonly long Offset = 0;
-
-			private BufferedStream fs;
-			public void Dispose()
-			{
-				fs?.Dispose();
-				fs = null;
-			}
-			public int Read(long byte_pos, byte[] buffer, int offset, int count)
-			{
-				//use quite a large buffer, because normally we will be reading these sequentially but in small chunks.
-				//this enhances performance considerably
-				const int buffersize = 2352 * 75 * 2;
-				fs ??= new BufferedStream(new FileStream(physicalPath, FileMode.Open, FileAccess.Read, FileShare.Read), buffersize);
-				long target = byte_pos + Offset;
-				if (fs.Position != target)
-					fs.Position = target;
-				return fs.Read(buffer, offset, count);
-			}
-			public long Length => length;
-		}
-
 		public void Load(byte[] waveData)
 		{
 		}