diff --git a/src/audioprocessor.hxx b/src/audioprocessor.hxx
index 4a3c7cc..c78ba7a 100644
--- a/src/audioprocessor.hxx
+++ b/src/audioprocessor.hxx
@@ -10,7 +10,7 @@ class AudioProcessor
     AudioProcessor(){}
     
     /// copies the track output to master buffer, sidechain & post-side buffer
-    virtual void process(int nframes, Buffers* buffers){printf("AudioProcessor::process() not derived\n");}
+    virtual void process(unsigned int nframes, Buffers* buffers){printf("AudioProcessor::process() not derived\n");}
     
     /// set main mix, 0-1
     virtual void setMaster(float value){}
diff --git a/src/looper.cxx b/src/looper.cxx
index c6f234d..4fc3618 100644
--- a/src/looper.cxx
+++ b/src/looper.cxx
@@ -196,7 +196,7 @@ void Looper::setSample(int scene, AudioBuffer* ab)
   writeToGuiRingbuffer( &e );
 }
 
-void Looper::process(int nframes, Buffers* buffers)
+void Looper::process(unsigned int nframes, Buffers* buffers)
 {
   float* out = buffers->audio[Buffers::TRACK_0 + track];
   
@@ -233,7 +233,7 @@ void Looper::process(int nframes, Buffers* buffers)
         playSpeed = float(actualFrames) / targetFrames;
       }
       
-      for(int i = 0; i < nframes; i++ )
+      for(unsigned int i = 0; i < nframes; i++ )
       {
         out[i] = clips[clip].getSample(playSpeed);
       }
diff --git a/src/looper.hxx b/src/looper.hxx
index 1b73642..7252b1f 100644
--- a/src/looper.hxx
+++ b/src/looper.hxx
@@ -43,7 +43,7 @@ class Looper : public AudioProcessor, public TimeObserver
     LooperClip* getClip(int scene);
     
     void updateControllers();
-    void process(int nframes, Buffers* buffers);
+    void process(unsigned int nframes, Buffers* buffers);
   
   private:
     const int track;
diff --git a/src/trackoutput.cxx b/src/trackoutput.cxx
index b8df5ad..7f1ad9d 100644
--- a/src/trackoutput.cxx
+++ b/src/trackoutput.cxx
@@ -53,7 +53,7 @@ void TrackOutput::setSend( int send, float value )
   
 }
 
-void TrackOutput::process(int nframes, Buffers* buffers)
+void TrackOutput::process(unsigned int nframes, Buffers* buffers)
 {
   // get & zero track buffer
   float* trackBuffer = buffers->audio[Buffers::TRACK_0 + track];
@@ -85,7 +85,7 @@ void TrackOutput::process(int nframes, Buffers* buffers)
   float* masterL       = buffers->audio[Buffers::MASTER_OUT_L];
   float* masterR       = buffers->audio[Buffers::MASTER_OUT_R];
   
-  for(int i = 0; i < nframes; i++)
+  for(unsigned int i = 0; i < nframes; i++)
   {
     float tmp = trackBuffer[i];
     
diff --git a/src/trackoutput.hxx b/src/trackoutput.hxx
index 69efae7..967b013 100644
--- a/src/trackoutput.hxx
+++ b/src/trackoutput.hxx
@@ -26,7 +26,7 @@ class TrackOutput : public AudioProcessor
     void setSend( int send, float value );
     
     /// copies the track output to master buffer, sidechain & post-side buffer
-    void process(int nframes, Buffers* buffers);
+    void process(unsigned int nframes, Buffers* buffers);
     
     ~TrackOutput();