instrument-a-day 14: corn music

I’ve always thought the patterns on corncobs looked like player piano rolls.  So I wrote a program that watches a slowly-turning corncob. Whenever a particularly dark kernel crosses the centerline of the image, it plays a note corresponding to the height.

You can download the Processing code from

Posted via email from moonmilk’s posterous

instrument-a-day 8: trash piano replacement hammers

NYCResistor rescued a battered old upright piano that was destined for
the dumpster. There were 6 missing hammers right in the middle, so I
made a quick and dirty set of replacements. Surprisingly, they have a
sound that’s pretty close to the original hammers.

The hammers are lasercut from 1/4" poplar, glued together in
pairs to be 1/2" thick and then sanded down to 0.4" to match
the original hammers. The extended slot in the bottom allows me to
glue the hammer onto the old broken shafts instead of replacing them,
and to tilt them to the right to hit the strings at the right angle.
The felt is some wool stuff from a craft drawer. Real hammer heads
are mostly felt, but I made these ones mostly wood because it was

Plans and instructions at

Posted via email from moonmilk’s posterous