King Tubby’s Big Knob Recreated
Dub Filter is a filter plugin modeled after King Tubby’s iconic Big Knob, a passive high pass filter with eleven frequency steps from 70Hz to 7.5KHz. This filter defined the sound of the entire roots era of Jamaican music and became a cornerstone of dub production.
Based on the Altec 9069B High Pass Filter used at King Tubbys Studio in Waterhouse, Jamaica, the plugin meticulously replicates the original behavior and expands it with modern control. Alongside the stepped Frequency and Impedance controls, Magnetism, Character, Dynamics and Artefacts shape the non linear response in depth. LFO and Envelope Follower modulation open the door to rhythmic pulsations and organic filter movement.

Features
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Stepped High Pass Filter
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LFO modulation with multiple waves
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Envelope Follower modulation
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Non-linearities and Inductance controls
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Resizable Window
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Preset system with randomizer
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GUI Brightness and Contrast Controls
macOS:
- macOS 10.13 or higher
Windows:
- Windows 7 or higher
- 64-bit
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