diff --git a/core/oslib/audiobackend_coreaudio.cpp b/core/oslib/audiobackend_coreaudio.cpp
index ad611d3bf..9ce685cd9 100644
--- a/core/oslib/audiobackend_coreaudio.cpp
+++ b/core/oslib/audiobackend_coreaudio.cpp
@@ -22,27 +22,31 @@
 
 AudioUnit audioUnit;
 
-#define BUFSIZE 8192
-u8 samples_temp[BUFSIZE];
+// ~ 93 ms
+#define BUFSIZE (4 * 1024 * 4)
+static u8 samples_temp[BUFSIZE];
 
-std::atomic<int> samples_wptr;
-int samples_rptr;
-cResetEvent bufferEmpty(false, true);
+static std::atomic<int> samples_wptr;
+static std::atomic<int> samples_rptr;
+static cResetEvent bufferEmpty(false, true);
 
-OSStatus coreaudio_callback(void* ctx, AudioUnitRenderActionFlags* flags, const AudioTimeStamp* ts,
+static OSStatus coreaudio_callback(void* ctx, AudioUnitRenderActionFlags* flags, const AudioTimeStamp* ts,
                             UInt32 bus, UInt32 frames, AudioBufferList* abl)
 {
     verify(frames <= 1024);
 
-    for (int i = 0; i < abl->mNumberBuffers; i++) {
-        if ((samples_rptr + abl->mBuffers[i].mDataByteSize) % BUFSIZE > samples_wptr) {
+    for (int i = 0; i < abl->mNumberBuffers; i++)
+    {
+        u32 buf_size = abl->mBuffers[i].mDataByteSize;
+        if ((samples_wptr - samples_rptr + BUFSIZE) % BUFSIZE < buf_size)
+        {
             //printf("Core Audio: buffer underrun");
-            memset(abl->mBuffers[i].mData, '\0', abl->mBuffers[i].mDataByteSize);
+            memset(abl->mBuffers[i].mData, '\0', buf_size);
         }
         else
         {
-            memcpy(abl->mBuffers[i].mData, samples_temp + samples_rptr, abl->mBuffers[i].mDataByteSize);
-            samples_rptr = (samples_rptr + abl->mBuffers[i].mDataByteSize) % BUFSIZE;
+            memcpy(abl->mBuffers[i].mData, samples_temp + samples_rptr, buf_size);
+            samples_rptr = (samples_rptr + buf_size) % BUFSIZE;
         }
     }
     
@@ -115,11 +119,21 @@ static void coreaudio_init()
 
 static u32 coreaudio_push(void* frame, u32 samples, bool wait)
 {
-    if (wait)
-        bufferEmpty.Wait();
-
-    memcpy(&samples_temp[samples_wptr], frame, samples * 4);
-    samples_wptr = (samples_wptr + samples * 4) % BUFSIZE;
+    int byte_size = samples * 4;
+    while (true)
+    {
+        int space = (samples_rptr - samples_wptr + BUFSIZE) % BUFSIZE;
+        if (space != 0 && byte_size > space - 1)
+        {
+            if (!wait)
+                break;
+            bufferEmpty.Wait();
+            continue;
+        }
+        memcpy(&samples_temp[samples_wptr], frame, byte_size);
+        samples_wptr = (samples_wptr + byte_size) % BUFSIZE;
+        break;
+    }
     
     return 1;
 }
diff --git a/shell/apple/emulator-osx/reicast-osx.xcodeproj/project.pbxproj b/shell/apple/emulator-osx/reicast-osx.xcodeproj/project.pbxproj
index fe8162a83..18335b7dc 100644
--- a/shell/apple/emulator-osx/reicast-osx.xcodeproj/project.pbxproj
+++ b/shell/apple/emulator-osx/reicast-osx.xcodeproj/project.pbxproj
@@ -193,6 +193,7 @@
 		84B7BF861B72871600F9733F /* EmuGLView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 84B7BF851B72871600F9733F /* EmuGLView.swift */; };
 		AE1E293B2095FB1600FC6BA2 /* rec_cpp.cpp in Sources */ = {isa = PBXBuildFile; fileRef = AE1E293A2095FB1600FC6BA2 /* rec_cpp.cpp */; };
 		AE1E294020A96B0B00FC6BA2 /* rec_x64.cpp in Sources */ = {isa = PBXBuildFile; fileRef = AE1E293F20A96B0B00FC6BA2 /* rec_x64.cpp */; };
+		AE8C27342111A31100D4D8F4 /* dsp_interp.cpp in Sources */ = {isa = PBXBuildFile; fileRef = AE8C27332111A31100D4D8F4 /* dsp_interp.cpp */; };
 		EBDF374F1BB96581001191B5 /* audiobackend_coreaudio.cpp in Sources */ = {isa = PBXBuildFile; fileRef = EBDF374D1BB96581001191B5 /* audiobackend_coreaudio.cpp */; };
 		EBDF37511BB969EE001191B5 /* CoreAudio.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = EBDF37501BB969EE001191B5 /* CoreAudio.framework */; };
 		EBDF37531BB969F8001191B5 /* AudioUnit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = EBDF37521BB969F8001191B5 /* AudioUnit.framework */; };
@@ -545,6 +546,7 @@
 		AE1E292B20947D4700FC6BA2 /* xbyak_util.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = xbyak_util.h; sourceTree = "<group>"; };
 		AE1E293A2095FB1600FC6BA2 /* rec_cpp.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = rec_cpp.cpp; sourceTree = "<group>"; };
 		AE1E293F20A96B0B00FC6BA2 /* rec_x64.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = rec_x64.cpp; sourceTree = "<group>"; };
+		AE8C27332111A31100D4D8F4 /* dsp_interp.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = dsp_interp.cpp; sourceTree = "<group>"; };
 		EBDF374D1BB96581001191B5 /* audiobackend_coreaudio.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = audiobackend_coreaudio.cpp; sourceTree = "<group>"; };
 		EBDF374E1BB96581001191B5 /* audiobackend_coreaudio.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = audiobackend_coreaudio.h; sourceTree = "<group>"; };
 		EBDF37501BB969EE001191B5 /* CoreAudio.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = CoreAudio.framework; path = System/Library/Frameworks/CoreAudio.framework; sourceTree = SDKROOT; };
@@ -929,6 +931,7 @@
 				84B7BDCD1B72720100F9733F /* aica_mem.h */,
 				84B7BDCE1B72720100F9733F /* dsp.cpp */,
 				84B7BDCF1B72720100F9733F /* dsp.h */,
+				AE8C27332111A31100D4D8F4 /* dsp_interp.cpp */,
 				84B7BDD01B72720100F9733F /* sgc_if.cpp */,
 				84B7BDD11B72720100F9733F /* sgc_if.h */,
 			);
@@ -1470,6 +1473,7 @@
 				84B7BEAF1B72720200F9733F /* cfg.cpp in Sources */,
 				84B7BF521B72720200F9733F /* ubc.cpp in Sources */,
 				84B7BF121B72720200F9733F /* zip_unchange.c in Sources */,
+				AE8C27342111A31100D4D8F4 /* dsp_interp.cpp in Sources */,
 				84B7BF421B72720200F9733F /* blockmanager.cpp in Sources */,
 				84B7BEE21B72720200F9733F /* zip_add_dir.c in Sources */,
 				84967CC91B8F49EE005F1140 /* pngset.c in Sources */,