From 5912dfdcd41cefe44e8c4e00f9ba6551cc060af8 Mon Sep 17 00:00:00 2001
From: Jakob Bak <jakob.bak@gmail.com>
Date: Thu, 24 Jan 2013 10:22:47 +0100
Subject: [PATCH] Added some comment text for interrupt select and
 NUM_OSCILLATORS

---
 software/lib/MMM/Music.cpp | 12 +++++++++---
 software/lib/MMM/Music.h   | 13 ++++++++++---
 2 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/software/lib/MMM/Music.cpp b/software/lib/MMM/Music.cpp
index 7539266..e75debd 100644
--- a/software/lib/MMM/Music.cpp
+++ b/software/lib/MMM/Music.cpp
@@ -37,10 +37,16 @@ MMusic Music;
 #define SPI_SCK 5
 #define SPI_MOSI 3
 
-// timer 2 is audio interrupt timer
-ISR(TIMER2_COMPA_vect) {
+
+//////////////////////////////////////////////////////////
+//
+// AUDIO INTERRUPT. USE EITHER 8bit or 12bitSine VERSION
+// COMMENT OUT THE ONE YOU ARE NOT USING
+//
+//////////////////////////////////////////////////////////
+ISR(TIMER2_COMPA_vect) { // timer 2 is audio interrupt timer
 	
-	OCR2A = 127;
+	OCR2A = 127; // don't change this
 	
 //	Music.synthInterrupt8bit();
 	
diff --git a/software/lib/MMM/Music.h b/software/lib/MMM/Music.h
index 1969235..e3d5701 100644
--- a/software/lib/MMM/Music.h
+++ b/software/lib/MMM/Music.h
@@ -25,13 +25,20 @@
 #ifndef Music_h // include guard
 #define Music_h
 
+////////////////////////////////////
+//
+// SET NUMBER OF OSCILLATORS HERE.
+// SHOULD BE 1, 2 or 3
+//
+////////////////////////////////////
+#define NUM_OSCILLATORS 1
+
+
 // current sample rate is 15625 as defined in the init() section
 #define SAMPLE_RATE 15625
 
-#define NUM_OSCILLATORS 1
-
 #ifndef NUM_OSCILLATORS
-	#error NUM_OSCILLATORS should be defined in the Music.h file in the libraries folder.
+	#error NUM_OSCILLATORS should be defined in the Music.h file in the libraries/MMM folder.
 #elif (NUM_OSCILLATORS == 1)||(NUM_OSCILLATORS == 2)||(NUM_OSCILLATORS == 3)
 #else
 	#error NUM_OSCILLATORS shall be 1, 2 or 3