View source for Mmc-august-2012/Lab1

= Lab 1 - Oscillators =

In this lab, we will experiment with a variety of oscillators, both by themselves and in combination as FM operators. 

== Audio Bootup ==
Make sure you are up-to-date with your Xcode install, and that you are able to load code onto your iOS device. Create a new project ("single-view application"), and add MoAudio as described in the audioStuff download (found here: [https://github.com/downloads/markcerqueira/mobile-music/audioStuff.zip audioStuff.zip]). To test everything out, write an audio callback that generates a sine wave at a fixed frequency, making sure that it runs in both the simulator and your device. 

== Basic Oscillators ==
Implement sine wave, triangle wave, sawtooth, and square wave oscillators using the phase-increment method shown in class. For each of these, structure the oscillator as a function that accepts a phase between [0,1] and returns the value at that phase, like this:
 float exampleOsc(float p)
 {
     return ???; // <-- fancy math goes here to figure out value for phase
 }
Call this function from your callback, incrementing the phase after each frame. Software engineers may recognize this basic design pattern as '''modularity''': the structuring of code into reusable blocks. As we will see later, we can and will reuse these oscillators for more than simple waveform generation.