I always liked the sounds I got while washing big steel bowls.
Trivia: the musical instrument called the Waterphone does contain water, but is named for its inventor, Richard Waters.
This trick was used as far back as the 19th century to synthesize musical tones. The gears have 24, 27, 30, 32, 36, 40, 45, and 48 teeth, so the notes are all related by simple fractions – that makes this a just intonation scale rather than equal temperament.
There's plans and instructions on thingiverse: http://www.thingiverse.com/thing:6662
A working violin made from maple and oak craft wood. The design is all 90 degree angles except the fingerboard. The tuning pegs are literally square pegs in round holes.
The thing's tuned two half-steps low until it gets used to the tension.
I have never played a violin, so many thanks to Bre Pettis who dusted off his 15-years-neglected fiddling skills to test-drive this violin! (Hey NYC violinists! Want to help test & demo this thing? Contact me.)
I hope to get all the designs uploaded to thingiverse soon – keep an eye on moonmilk.com if you're interested.
Yeah, I like whistles. This one's made from a brass tube and a wooden dowel from a craft store. The fipple was cut with a hacksaw, and the finger holes drilled with a drill press.
I lasercut some strips of poplar for another project, and found that the waste wood could be plucked like guitar strings. The strips make pretty good rattles too.
It's just a photodiode, a 9-volt battery, and a little amplifier, but it makes the vibrations in artificial light audible. A lot of what you hear is derived from 60Hz AC power, but electronic displays have tones of their own.
Scanning a handheld magnetic pickup back and forth over the piano strings makes a pretty neat sound. I may try attaching a rail on which the pickup can slide back and forth.
The pickup is plugged into an ordinary guitar amp.
Plug: Fun with Sensors workshop this Saturday at NYC Resistor!