The Hackeramp patch is a stupid but handy Maxplay application that turns your laptop into a simple amplifier for testing contact microphones, coil pickups, bent toys, homemade circuits, or any other audio device with an output jack. It provides enough gain for low-level microphones, and can be monitored over the computer's built-in speakers, through headphones, or through external speakers connected to the laptop's output. The on-screen controls centralize, and make easily accessible, audio adjustments that would otherwise entail messing around in system preferences.
How to build your own spring and plate reverbs. I wrote this for for the March/April 2010 issue of Tape Op (#76). Contact mikes, slinkies and cymbals -- oh my!
How to wire up a momentary pushbutton switch that can be changed on the fly from Normally Open to Normally Closed. Sounds dumb but this is really useful.
Corrections to some errors in the second edition of Handmade Electronic Music.
My first published work ever. This circuit appeared in Electronotes (Vol. 7, #60, December, 1975), the infamous newsletter of amateur synthesizer hackers -- roots of Handmade Electronic Music!