I played a lot with processing today and almost forgot about the homework.
Here comes the visualization for the famous pink song:
First I changed the audio source to line-in so that I could play live with whatever I want. And I do love to snap to my laptop and see it react. *snap* *snap*
Also it’s fun to whistle at the program to see what’s happening.
The primary factor for visualization in this piece is the shape of diamond. I do not really want to mess up with 3D transforming and matrix things…so to make life easier I came up with following specs:
* Frequency – mapped to color of the diamond. Firstly the full spectrum was mapped to full Hue scope in a linear manner. That is to map 0 – 22050Hz to 0-360. However for music and vocal the frequency gathers around below 2000Hz, so I trimmed the sample frequency range to 0 – 16000Hz. Not much difference in the result though because it’s not enough. But at least it’s more colorful than before the change, and actually I don’t really wish to lose the sampling of higher frequency.
* Amplitude – mapped to saturation and size of the diamond. A little randomness was also added.
* History – I would rather create an overall feeling of the piece of the sound than to analyze its features at any timeslot. So I made the previous visualization of the sound fade into the background. I’m thinking of a better solution though… maybe after I get comfortable with the 3D stuff.
* Keyboard Controls – several commands could be made through keyboard shortcuts:
1) l (as in Leopard) – toggle log/debug mode (which shows a waveform of spectrum)
2) c – clear screen
3) + – increase threshold for amplitude, which filters frequency with amplitude above threshold to sample
4) – - decrease threshold for amplitude
After getting tired of snapping, I used miniAudicle to generate sounds for testing, which looks pretty good from the result’s aspect.
Link for applet (using pink.mp3)
http://leejayxia.com/processing/v5s_week2/
To play it with microphone you need to download Executable for Mac OSX
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