diff --git a/src/emulator.c b/src/emulator.c
index 7d06e66..6f21d5f 100644
--- a/src/emulator.c
+++ b/src/emulator.c
@@ -556,7 +556,7 @@ void emulateFrame(){
    blip_end_frame(palmAudioResampler, AUDIO_END_OF_FRAME);
    //printf("There are %d audio samples available\n", blip_samples_avail(palmAudioResampler));
    blip_read_samples(palmAudioResampler, palmAudio, AUDIO_SAMPLES_PER_FRAME, true);
-   for(uint32_t samples = 0; samples < AUDIO_SAMPLES_PER_FRAME * 2; samples += 2)
+   MULTITHREAD_LOOP for(uint32_t samples = 0; samples < AUDIO_SAMPLES_PER_FRAME * 2; samples += 2)
       palmAudio[samples + 1] = palmAudio[samples];
 
    //video
diff --git a/src/portability.h b/src/portability.h
index 76c9f62..2ccc69c 100644
--- a/src/portability.h
+++ b/src/portability.h
@@ -18,6 +18,11 @@ static inline uint64_t uMax(uint64_t x, uint64_t y){
    return x > y ? x : y;
 }
 
+static inline uint64_t uClamp(uint64_t x, uint64_t y, uint64_t z){
+   //x must always be less than z!
+   return (y < x ? x : y) > z ? z : y;
+}
+
 static inline int64_t sMin(int64_t x, int64_t y){
    return x < y ? x : y;
 }
@@ -26,6 +31,11 @@ static inline int64_t sMax(int64_t x, int64_t y){
    return x > y ? x : y;
 }
 
+static inline int64_t sClamp(int64_t x, int64_t y, int64_t z){
+   //x must always be less than z!
+   return (y < x ? x : y) > z ? z : y;
+}
+
 static inline double dMin(double x, double y){
    return x < y ? x : y;
 }
@@ -34,6 +44,11 @@ static inline double dMax(double x, double y){
    return x > y ? x : y;
 }
 
+static inline double dClamp(double x, double y, double z){
+   //x must always be less than z!
+   return (y < x ? x : y) > z ? z : y;
+}
+
 
 static inline uint64_t getUint64FromDouble(double data){
    //1.32.31 fixed point