Source Audio has announced the availability of the Soundblox Guitar Envelope Filter pedal. The new stompbox comes packed with 21 individual envelope filter effects, costs $119 (street), and is ...

Whenever an instrument produces a note, its volume creates a certain shape as it changes over time. A piano note, for example, has a near-instant onset and drops to silence after the key is released.

If there’s one effect pedal that can give you that instant funk-bass sound, it’s unquestionably the envelope filter. The first, and still widely considered the best, is the Musitronics Mu-Tron III.

There are a few ways of playing .WAV files with a microcontroller, but other than that, doing any sort of serious audio processing has required a significantly beefier processor. This isn’t the case ...