redoing tutorials a bit

1 files changed, 11 insertions, 5 deletions

diff --git a/maximilian_examples/3.AM1.cpp b/maximilian_examples/3.AM1.cpp
index ec96c7f..384a7f5 100755
--- a/maximilian_examples/3.AM1.cpp
+++ b/maximilian_examples/3.AM1.cpp
@@ -1,15 +1,21 @@
 #include "maximilian.h"
 
-//This shows how to use maximilian to do basic amplitude modulation
+//This shows how to use maximilian to do basic amplitude modulation. Amplitude modulation is when you multiply waves together. In maximilian you just use the * inbetween the two waveforms.
 
 maxiOsc mySine,myOtherSine;//Two oscillators. They can be called anything. They can be any of the available waveforms. These ones will be sinewaves
 
 void setup() {//some inits
-	//nothing to go here this time	
+    //nothing to go here this time
 }
 
 void play(double *output) {
-	
-	*output=mySine.sinewave(440)*myOtherSine.sinewave(10);
-	
+    
+    // This form of amplitude modulation is straightforward multiplication of two waveforms.
+    // Notice that the maths is different to when you add waves.
+    // The waves aren't 'beating'. Instead, the amplitude of one is modulating the amplitude of the other
+    // Remember that the sine wave has positive and negative sections as it oscillates.
+    // When you multiply something by -1, its phase is inverted but it retains its amplitude.
+    // So you hear 2 waves per second, not 1, even though the frequency is 1.
+    output[0]=mySine.sinewave(440)*myOtherSine.sinewave(1);
+    
 }