Signal Tools Co dropped native Linux support for Pro Knob plugins. These single-control mixing tools now run as 64 bit VST3 on open-source systems. Each knob hides a full processor so every position delivers finished audio immediately. Fifteen paid modules join the free Rack that chains ten units into recallable presets.
Clamp and Compressor plus De Esser and De Harsh make up part of the lineup. De Mud and Delay and Gate and Glue round out the processing options. Plate and Presence and Saturator and Shimmer and Tape and Tilt and Width complete the set. Aux send variants exist for Delay and Plate and Shimmer specifically.
Free downloads include Pro Knob Rack alongside Trimmer and Unlock utilities. macOS users get AAX and VST3 and AU formats while Windows supports AAX and VST3. Linux builds require glibc 2.35 minimum with X11 or XWayland display servers. Online activation uses a free account instead of iLok hardware dongles.
Fourteen-day trials cover all fifteen paid processors right now. Individual units sell for $7.95 currently but jump to $14.95 after December 4, 2026. The Essentials bundle costs $79.95 until that same date, before rising to $129 permanently. All Access subscriptions run $9.95 monthly or $99 annually for full library access.
Clamp and Compressor plus De Esser and De Harsh make up part of the lineup. De Mud and Delay and Gate and Glue round out the processing options. Plate and Presence and Saturator and Shimmer and Tape and Tilt and Width complete the set. Aux send variants exist for Delay and Plate and Shimmer specifically.
Free downloads include Pro Knob Rack alongside Trimmer and Unlock utilities. macOS users get AAX and VST3 and AU formats while Windows supports AAX and VST3. Linux builds require glibc 2.35 minimum with X11 or XWayland display servers. Online activation uses a free account instead of iLok hardware dongles.
Fourteen-day trials cover all fifteen paid processors right now. Individual units sell for $7.95 currently but jump to $14.95 after December 4, 2026. The Essentials bundle costs $79.95 until that same date, before rising to $129 permanently. All Access subscriptions run $9.95 monthly or $99 annually for full library access.
