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Table of Contents
Overview
The Wow & Flutter module allows for transparent correction of pitch variations in your audio due to inconsistent speed of the recording medium. Wow & Flutter can be tailored to different rates of wow, and allows for global pitch correction to compensate for static pitch offsets. The detected wow or flutter pitch contour can also be written to the spectrogram for diagnostic purposes.
Note
When applied to a bandwidth-limited selection, Wow & Flutter will only use the selected frequency band for detection of pitch variations. When applied to a full-band selection, the algorithm will automatically determine the most suitable frequency range for analysis. Multiple selections will be combined into one time selection and processed as a whole.
Controls

Wow
Addresses slower pitch variations (typically 0 to 5 Hz).

You can choose from the following Wow Rate options:
- Fast: targets wow in the 2 to 8 Hz range.
- Medium: targets wow in the 0.5 to 2 Hz range.
- Slow: targets wow in the 0 to 0.5 Hz range.
When this mode is selected, a Display wow checkbox is available in the module footer. See the Display Wow/Display Flutter section below for more information.
Flutter
Addresses quicker pitch variations (8 to 40 Hz).

When this mode is selected, a Display Flutter checkbox is available in the module footer. See the Display Wow/Display Flutter section below for more information.
Sensitivity
Determines how aggressively the pitch variations will be corrected. A lower sensitivity can prevent desirable pitch fluctuations like vibrato from being impacted.
Center Global Pitch
When checked, this control centers the audio around the specified concert pitch. If a static pitch offset is present in the material, it will be corrected toward a specific tuning of the musical scale. The default pitch value is 440 Hz.
When unchecked, processing will preserve the length of the selection and its average pitch intact.

Display Wow/Display Flutter
Enabling this checkbox will render the detected pitch contour of the wow or flutter onto the audio file. No correction will be applied, but the detected pitch variations will be printed as a diagnostic tool.
Rendered with Display Wow checked | Rendered with Display Flutter checked |
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Note
Wow & Flutter is not available in the Batch Processor, Module Chain or Composite View.
RX 8.5.0
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