Ambify

Ambify is a small analog rig that turns raw audio signal into light — no microcontroller, no code running the show, just a signal chain of op-amps, comparators, and an oscilloscope used as a display.

why analog

Every digital visualizer I'd built before had the same problem: an ADC, a buffer, and a render loop between the sound and the image, and you can feel that latency even at a few milliseconds. Ambify skips all of it. The audio signal is split, filtered into bands with passive RC networks, and fed straight into the X/Y inputs of an oscilloscope in XY mode, so the waveform you see is the waveform, not a reconstruction of it.

There's no frame rate to an analog signal — the image is exactly as fast as the sound.

tuning by ear (and by eye)

Most of the build time went into Pure Data patches used purely as a design tool — prototyping filter curves and phase relationships in software before committing them to a breadboard. Once a shape looked right on screen in Pd, I'd rebuild that same transfer function with discrete analog components. It's a slower way to iterate than staying entirely in software, but the resulting Lissajous patterns have a texture — a liveliness — that a purely digital synthesis of the same math doesn't quite reproduce.