SIGNAL TOOLS CO.

Professional-grade tools that react as fast as your instincts.

The Pro Knob Series

One knob.
One decision.

Professional audio tools with everything stripped away but the move that matters. Each one does a single job, exceptionally well — so you spend your session listening, not reading parameters.

AAX · VST3 · AU No iLok. No dongle. macOS
Why single-knob

Built to get out of your way.

A plugin with forty parameters asks you to become its engineer before you can use it. We do that deep tuning during development — against real records — and hand you the one control that actually moves the sound. Each knob drives an entire process under the hood. You stay in charge of the mix with tools that keep up with your creative pace.

One move per tool

Each plugin does one thing — compression, saturation, de-essing, space — and does it exceptionally. No menus, no distractions, no parameter fatigue — only great. Turn it until it sounds right.

A whole chain, one view

Load your tools into the Rack and adjust an entire signal chain without switching windows. Everything you're doing to the sound, visible and reachable at once.

Real DSP underneath

Simple to use is not simple inside. The processing is engineered and tuned to hold up on professional work — the ease is on your side of the screen, not in the sound.

The Rack

Your whole chain, in one window.

Drop any tools into a single rack, arrange them in order, and dial the entire chain from one view — no clicking through plugin windows to find the one you need. Save a chain you like and recall it on the next session, the next song, the next record.

And you don't start from empty. The Rack ships with signal chains built by top-tier mix engineers — real starting points from people whose records you already know. Load one, hear how they work, make it yours.

Pro Knob Rack — the 10-bay host with a full chain loaded