based on the BabyGnusbuino (anyma) and Viznut's "Algorithmic symphonies from one line of code", put together by dusjagr, ucok and iyok... (also works on an arduino)

void loop ()
{
c4 = ((analogRead(potiPin4)>>6) + 1);
c3 = analogRead (potiPin3);
v = t * ((t>>15|t>>c4)&83&t>>(c4>>3));
digitalWrite (speakerPin, v);
delayMicroseconds(c3);
t++;
}

links:
youtube.com/watch?v=GtQdIYUtAHg
wurstcaptures.untergrund.net/music/
wiki.sgmk-ssam.ch/index.php/Babygnusbuino

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