Hum Remover
Semantic type: HumRemover · Category: restoration
Reduces mains hum and its harmonics.
Contract
- Seeded: no
- Catalog sample rates: not declared; this does not mean unsupported
- Assets: none
- Catalog-declared latency: zero
| Semantic name | Python constructor keyword | Type / count | Default | Unit | Range or values |
|---|---|---|---|---|---|
frequency |
frequency |
string / 1 | "Auto" |
Not declared in catalog | Auto, 50 Hz, 60 Hz |
harmonics |
harmonics |
integer / 1 | 8 |
Not declared in catalog | 1 … 64 |
trackingSpeed |
tracking_speed |
number / 1 | 50 |
% | 0 … 100 |
EffeTune app documentation
The following section is reproduced from the English EffeTune app documentation. Its parameter names and values describe the app UI and can differ from semantic API parameters through transforms or value maps. The generated contract above is authoritative.
Hum Remover
Hum Remover reduces a steady electrical mains hum and its harmonics, such as a 50 Hz or 60 Hz buzz from a turntable, cable, or power-related fault. It is for a constant tone, not general background noise.
Listening Guide
- Start with Frequency set to Auto, Harmonics at 8, and Tracking Speed at 50%.
- If you know the mains frequency in the recording, choose 50 Hz or 60 Hz. Otherwise, leave Auto selected and check the displayed FUNDAMENTAL.
- Raise Harmonics when audible buzz remains above the fundamental; lower it if the music loses too much body or detail.
- Raise Tracking Speed when a hum slowly drifts in pitch; lower it for a stable hum if you want gentler tracking.
- If sustained bass or another musical tone exactly matches a hum harmonic, lower Harmonics to leave that frequency less affected.
Parameters
- Frequency (Auto, 50 Hz, or 60 Hz; default Auto) selects the hum fundamental. Auto follows a detected mains-like hum; choose a fixed value when the hum is known to be 50 Hz or 60 Hz.
- Harmonics (1–64, default 8) chooses how many multiples of the fundamental are removed. Higher values can clear more buzz, while lower values preserve more musical content near higher harmonics. The slider uses a logarithmic scale to give lower settings more adjustment space.
- Tracking Speed (0–100%, default 50%) controls how quickly automatic tracking follows a changing hum. Higher values follow drift more quickly; lower values change more slowly and suit a stable hum.
Reading the Display
FUNDAMENTAL shows the frequency currently targeted by the effect. REMOVED shows the level of the hum component being removed in dBFS: a value closer to 0 dBFS means a stronger removed hum, while a very low value (such as -140 dBFS) means little or no hum is currently being removed.