Some interesting things I bookmarked on del.icio.us on March 18th, 2008:

• Squarecave: a DIY analog/digital synthesizer - The Squarecave is a hybrid digital and analog music synthesizer. It uses digital CMOS ICs to generate a sequence of oscillations of varying pitch and volume, and then pipes the result through analog filters (lo-pass, hi-pass, band-pass).

Hand-drawn schematic, working digital sequencer prototype and finished Squarecave.

• The HarmoNESica - That's a NES cartridge and a harmonica.
• The “Amen Break” and Golden Proportion by Michael S. Schneider - I became intrigued when I saw an image of the audio waves themselves because I immediately recognized the Golden Ratio in the structure of its timing. And I was surprised to find an even deeper relationship to the structure of the human body.