Audio Mixing Cheat Sheet
Audio Mixing Cheat Sheet
General Mixing
Vocal Inputs
The input preamp gains are for the most part preset and don’t need to be changed. They are preset for 0 db on the fader
which results in the input meter showing between -9 and -18 dB (i.e. just in the yellow). Various media files will have
very different volume outputs (i.e. some videos are louder than others) so you will need to monitor this and tweak the
fader to the ideal level range as needed.
Buses – A collection of inputs grouped together
All Buses are preconfigured, set to 0 dB and should not be adjusted (except for the Live Stream buses which the Live
Stream Operator controls).
DCAs – a master level control for all inputs that are assigned to a DCA group
The Audio Operator regularly adjusts the DCA to control levels during a service.
It’s important to recognize that a DCA controls the level of the assigned inputs prior to sending to any buses, whereas,
trying to accomplishing the same thing with a bus is less effective because it only works for that one bus. Any other
buses that also get that input would not be effective and can result in undesirable effects (example: live streaming).
We use the effects process for vocalists to add reverb and apply sibilance to the input. All Solo & Handheld mics are
already configured to send to the proper Reverb Bus & DCA. The audio operator only needs to control the DCA level and
the Reverb Effect via the Fx1 Encoder (reverb delay effect) in the “Assign” section of the board.
Speaker Mics
There three mics we use for Pastors/Guest Speakers (Pastor1, Pastor2, LAV1). There’s a Bus & DCA called “Pastor.” You
need to adjust the desired source fader to 0 dB depending on who is preaching. Leave it on and use the DCA to control
the levels during the service (not the input).
Scenes are saved snapshots of the entire sound board. You can quickly restore the baseline configuration or switch
between scenes customized for a specific purpose or event (i.e. Christmas Play vs. Standard Service). “CBC Service” is the
baseline Scene for everyday use. Use the Show Control “View” button to quickly access the Cues, Scenes or Snippets
and apply the appropriate Scene.
Mixing Choir Music
Mixing choir music is unique from mixing most other audio sources because of the use of stage monitors with different
output level needs. The sound board is configured such that the fader levels for the input/source (WMP & CD R,L) and
Buses & DCAs (Stage & Choir Monitors) are preset and don’t need to be changed. All adjustment of the levels should be
done with the preamp Gain encoder. This ensures that the level adjustments are applied uniformly across all routes.
The associated faders and Gain encoder [1] are shown below. Adjust the Gain of the WMP input such that Output
Channel 7 is approximately -20 dB [Note: Output 7 is the Choir Monitors].
Stereo vs. Mono Music Tracks
Choir music has both split tracks (voice usually on the Right channel & music on the Left channel) and stereo songs
(separate performance music on both channels). Usually the filename in Windows Media Player indicates which type the
file is. The choir typically performs with music only (Right = Mute, Left = Full) while a children’s group will sometimes
play with a small vocal background (Right = Partial, Left = Full).
A snippet is a group of focused setting changes for a given purpose. CBC has snippets for “WMP & CD Stereo” for stereo
tracks and “WMP & CD Mono” to play the music channel of a split track on both output channels. Use the Show Control
“View” button to quickly access the Cues, Scenes or Snippets and apply the appropriate Choir snippet for each song. In
stereo, the WMP channels are link and all settings will effect both channels simultaneously (i.e. gain, faders, mute, etc).
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