Signal Tools Co. has released Pro Knob Rack, a free host for chaining the Pro Knob Series single-control mixing plugins. Chains can be saved and recalled in any session and any DAW. Pro Knob Trimmer and Pro Knob Unlock are also free with every account.
Pro Knob Series
The launch includes fifteen paid plugins, plus Trimmer and Unlock. Each module runs a full process behind one control:
- Pro Knob Clamp
- Pro Knob Compressor
- Pro Knob De-Esser
- Pro Knob De-Harsh
- Pro Knob De-Mud
- Pro Knob Delay
- Pro Knob Gate
- Pro Knob Glue
- Pro Knob Plate
- Pro Knob Presence
- Pro Knob Saturator
- Pro Knob Shimmer
- Pro Knob Tape
- Pro Knob Tilt
- Pro Knob Width
Aux send versions are included with Pro Knob Delay, Pro Knob Plate and Pro Knob Shimmer.
Pro Knob Rack
Pro Knob Rack is a free 10-bay host. It can load up to ten modules into one window, save chain presets for recall in any DAW, and keep module settings with a module when its position changes. New Rack modules are planned, and Pro Knob All Access includes each new module as it ships.
Engineers
Signal Tools Co. says the launch chain library was built by working engineers. Its site identifies Daniel Escobar as a Grammy-winning recording and mixing engineer with credits including Rosé, SZA, Karol G, Sia and Barbie The Album. It identifies Bob Horn as a mix engineer with credits including BTS, Michael Jackson, Timbaland, Lupe Fiasco and Jackson Wang.
Features
- One shared panel across the modules provides input and output gain, metering, solo and bypass.
- Activation uses the free Signal Tools Activator app. No iLok or dongle is required, and each license supports two computers.
- Each paid plugin has a 14-day trial, and all fifteen can be tried together. No card or automatic conversion is required.
Pricing and Availability
Available now at SignalToolsCo.com at intro prices through December 4, 2026: $7.95 per paid plugin, $79.95 for the Pro Knob Essentials Bundle of all fifteen paid plugins, and $9.95 per month or $79 per year for Pro Knob All Access. Founding subscribers keep their rate until at least December 6, 2029. From December 5, 2026, prices rise to $14.95 per plugin, $129 for the bundle, and $14.95 per month or $149 per year for All Access. Pro Knob Rack, Pro Knob Trimmer and Pro Knob Unlock are free with every account.
Read More