DE-HUM

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Controls

• Frequency50 Hz / 60 Hz — Mains frequency of the hum: 50 Hz (Europe, most of the world) or 60 Hz (Americas, parts of Asia)
• Harmonics1 to 8 — Number of notches: the fundamental and its multiples (1 = fundamental only, 8 = up to the 8th harmonic)
• Q5 to 100 — Notch width as Q: bandwidth = frequency / Q, so higher values cut narrower and leave more of the music
• Depth0 to 60 dB — How deep each notch cuts, from 0 (off) to 60 dB
• Fine−2 to +2 Hz — Fine tune of the mains frequency in Hz (±2), for hum that sits slightly off 50/60 Hz; the harmonics follow
• Low CutOff / 20 Hz / 30 Hz / 40 Hz — Optional 24 dB/oct high-pass below the hum (20, 30 or 40 Hz) to clear rumble

Best uses

• Remove ground-loop hum from guitar, bass and DI recordings
• Clean buzz from field recordings, interviews and podcasts
• Repair old tapes and vinyl transfers with mains hum
• Tidy hum on vintage synths and noisy amp recordings
• Clear subsonic rumble along with the hum

Properties

Signal chain: Input → optional Low Cut (two TPT high-pass stages, 24 dB/oct) → up to 8 notch biquads at h × (50/60 Hz + Fine) → Output. Each notch has the poles of a band of width f/Q and cuts by exactly Depth at its centre; stereo, zero latency.

Formats

• JSFXJSFX for REAPER, with REAPER's own sliders
• GFXJSFX GFX for REAPER, with its own interface
• VST3VST3 for any DAW
• CLAPCLAP for any DAW

Factory presets

Mains Clean 50 Hz · Mains Clean 60 Hz · Amp Buzz 50 Hz · Amp Buzz 60 Hz · Vocal Safe 50 Hz · Vocal Safe 60 Hz · Heavy Hum And Rumble

In the FX chains and Rack presets

Dialogue Cleanup · Podcast Ready

See every FX chain

Try it