Sonnox Oxford DeBuzzer - Hum and Buzz Removal Plug-In (Native)

Sonnox Oxford DeBuzzer - Hum and Buzz Removal Plug-In (Native)

Sonnox Oxford DeBuzzer - Hum and Buzz Removal Plug-In (Native)


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Product Highlights

  • Separate Detect and Remove Sections
  • Advanced Algorithms
  • Scalable High Resolution FFT Display
  • Choice of Removal Filters
  • Audio Units
  • RTAS
  • VST
  • PowerCore
  • Mac OS X
  • Windows Xp/Vista/7
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  • 1Description

The Oxford DeBuzzer from Sonnox is a plug-in that removes hum and buzz from audio material and is divided two stages - detection and removal. For the process to work well, the fundamental frequency must first be very accurately defined.

The plug-in features several ways of helping isolate the fundamental frequency. First is the Peak Profile that shows the strength of a given nominal frequency in the input signal. Second is the large FFT display which accentuates any frequency components that are consistently present, making them stand out in the plot. It will automatically mark the three highest peaks found, and the nominal frequency can then be set by clicking one of the peaks on the graph.

The third method uses a tone generator in the same way that one can tune a guitar. As the generated tone moves closer to the fundamental, the beat frequency between the tone and the fundamental will become slower and slower. Noise removal is accomplished using a comb filter. The comb filter has multiple tight notches that eliminate the fundamental frequency and associated harmonics.

Tracking Modes
  • Fast, Auto and Freeze modes
  • By default the plug-in assumes Auto mode, continuously hunting either side of the nominal frequency for a peak profile
  • Once the lock strength rises to be above a certain level, the plug-in automatically sets the nominal frequency to the frequency of the peak found
  • If the hum is wandering in frequency, the detector will follow
  • Auto Mode is suitable for tracking a weak, slowly wandering fundamental and operates over all three frequency bands
  • Fast tracking mode allows the removal filters to automatically follow a quickly wandering fundamental
  • Freeze Mode is best used for removing whines and whistles along with the use the FFT to find the frequency of the whines
Filter Choice
  • The default removal filter is a comb filter
  • Para-EQ mode overrides the default allowing for use of the parametric EQ sections to remove the fundamental and harmonics
  • In Para-EQ mode attenuation can be reduced as frequency is increased using the Slope control
  • It is possible to choose to notch out odd and even harmonics, as opposed to only odd harmonics
  • The listen section of the Output Panel labeled "Diff" contains an option to listen to the difference between the input and the processed output
  • Particularly useful for hearing what has been repaired, and for listening to the quality of the repairs without being distracted by the audio material
Table of Contents
  • 1Description


Sample Rates 44.1, 48, 88.2 and 96kHz
Latency Pro Tools RTAS (Samples)
7041 @ 44.1/48kHz
14337 @ 88.2/96kHz

VST (Samples)
6145 @ 44.1/48kHz
12289 @ 88.2/96kHz
Control Functions and Ranges
Fundamental Frequency Ranges
20Hz to 160Hz
160Hz to 1280Hz
1280Hz to 20kHz

Width of the Frequency Detect Window
LF: 3%
MF: 2%
HF: 0.5%
LF: 12%
MF: 8%
HF: 1.5%
LF: 20%
HF: 2%

Resolution of Frequency Adjustment
Normal: 1.0Hz
Fine: 0.1Hz
Shift-Fine: 0.0001Hz

Bandwidth Range: 75Hz to 20kHz
Sharp/Q: 16 to 160
Attenuation: 0dB to -144dB
Tone: -96dB to -6dB

Input Trim: -12dB to +12dB
Output Trim: -12dB to 0dB
System Requirements Mac
OSX 10.4 or later
1GB RAM minimum
Host software that supports Audio Units, RTAS or VST plug-in formats
iLok key with latest drivers

Windows XP, Vista (32- and 64-bit), or Windows 7 (32- and 64-bit)
1GB RAM minimum
Host software that supports RTAS or VST plug-in formats
iLok key with latest drivers


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