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audio analysis meets white square (200px x 200px)

in this homework, I want you to have the same basic rules:

a) start with a white square, 200px x 200px, centered on the screen  *
b) start with a blackbackground
c) draw nothing else on screen

note, to center on the screen, you can use 
ofSetRectMode(OF_RECTMODE_CENTER);
ofRect(ofGetWidth()/2, ofGetHeight()/2, 200,200);
or 
ofRect(ofGetWidth()/2 - 100, ofGetHeight()/2 - 100, 200,200);

then, based on sonic input, manipulate  the square (or the scene).  what happens to the  square is up to you, does it rotate?  does it change in color?  grow? bounce? explode??

think specifically about sonic qualities, like pitch, and frequency information, and think about “performing” your white square.

make 3 different examples using the variety of techniques of analysis we talked about, pitch detection, fft, and volume detection.

have fun!

+

also make a graphical score to a piece of music / sound for which traditional music notation isn’t necessary.  Think about what visual languages you can use to represent sound.   for inspiration, see:

http://en.wikipedia.org/wiki/Graphic_notation

http://www.eyemagazine.com/feature.php?id=23&fid=168

http://at.or.at/hans/solitude/

a) See something in new york — a performance, installation, play  — and take some photographs or notes about it.  Let’s do research IRL not just on the net!

b) Create 3 interactive audio visual systems based on AM, FM or Additive synthesis and a primitive visual form (circle, square, triangle).   Think about creating the tightest relationship between the sound and the visual form, and how interaction (mouse, keyboard, other) can influence that.

a) implement additive, AM and FM synthesis using the sin wave code as a starting point.

b) using additive synthesis, create the most harmonious, beautiful sound that you can.  think about using multiple sin osicllators, with various levels of volume.  Be very, very, very careful not to clip your sounds (ie, scale the volumes so that they add up to less then 1.0).    Use many oscillators.

c) using additive synthesis, create the most evil, terrible, cacophonous and dissonant sound.   Again, take care about volume levels.

d) try to see what the limit of your computer is by adding as many sin oscillators as you can together.   how many can you put into the app with out it skipping.  take care about the volume of each osciallator.

e) using any synthesis technique, attempt to recreate these tones: 

f) make music ! try to transcribe a song (turning the notes into frequencies) and play it via code. And / or, try to create a sequencer that allow you to compose music by controlling some parameters of synthesis over time.   then, create some music with this tool.

have fun!