Blackmagic Design DaVinci Resolve Studio (Dongle) - Manual (Page 259)

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Lesson 9
Mixing Sound in Fairlight: Exploring the Interface
3 Press Option-/ (slash) in macOS or Alt-/ (slash) in Windows to play from the in to
out points.
In the VO, you can hear a low-pitched background buzz. This is not an uncommon
problem and can happen when an electrical signal seeps into your audio cables.
Typically, it is due to poor electrical grounding or poor audio cable shielding.
You have a convenient tool to minimize this common problem: a notch filter that can
block a very narrow band of audio frequencies in your recording. The buzzing hum in
this audio clip, as is often the case, is at a frequency of 60 Hz or 50 Hz depending on
whether you recorded in North America, Asia, or Europe (due to the AC delivery
standards in those continents.) Since this type of buzz is so common and so specific,
Fairlight includes a special De-Hummer Fairlight FX plug-in to address the problem.
4 In the upper-left of the Resolve window, close the Media pool, and click the Effects
library button to display the Audio FX plug-ins.