diff --git a/J/shader.h b/J/shader.h
index 3d2eed1..88a52b3 100644
--- a/J/shader.h
+++ b/J/shader.h
@@ -271,7 +271,7 @@ private:
     
     // ***************
     // status checking
-    void check_compile_status(GLint shader, std::string source = "") {
+    void check_compile_status(GLuint shader, std::string source = "") {
         #if defined(DEBUG)
 		GLint status = GL_FALSE;
 		glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
diff --git a/J/sound.h b/J/sound.h
index b3c488d..16063ba 100644
--- a/J/sound.h
+++ b/J/sound.h
@@ -86,13 +86,13 @@ struct Source {
 	Source(Source const &) = delete;
 	Source & operator=(Source const &) = delete;
 	
-	Source(Buffer const & buffer){
-		int r = rand() % 10;
-		float pitch = 0.5 + r*0.5;
-		
+	Source(Buffer const & buffer){		
 		alGenSources(1, &source);
 		alSourcei(source, AL_BUFFER, buffer.buffer);
-		alSourcef(source, AL_PITCH, pitch); //?
+	}
+	
+	void set_pitch(float pitch){
+		alSourcef(source, AL_PITCH, pitch);
 	}
 	
 	void play(){