Connect Audio Source; Connect Headphones - Sound Devices 688 Quick Start Manual

5. Connect Audio Source

Input 1 On the left panel, there are six XLR-3F connectors for balanced microphone
or line-level inputs, and six TA3-F connectors for line level inputs.
XLR Connector
To connect an audio source:
▶ Use a standard XLR cable and connect a microphone or line level analog
source to an Input XLR connector.
Note: Input 1 or 6 can also accept AES3 or AES42 (Mode 1) signal. (Pin-1 ground, pin-2
positive, pin-3 negative.)

6. Connect Headphones

Be careful of high headphone levels when connecting your headphones.
To connect headphones:
1. Prior to connecting your headphones, turn the Headphone encoder
counter-clockwise until the LCD shows the headphones off.
2. Connect headphones to either the 1/4-inch or 3.5mm headphone out-
puts, located on the left panel of the 688.
3. Turn the Headphone encoder clockwise slowly until the level you want
is reached.
688 Mixer & Recorder
8
3.5mm
1/4"
7. Select a Headphone Source
To set up the headphone source:
1. Press the Headphone encoder to display the list of available sources.
The list will auto-close if no selection is made within a few seconds.
2. Turn the encoder to choose LR ST, the master left and right stereo bus.
3. Press the encoder to confirm selection.
8. Adjust Trim and Fader Controls
The gain of an input is adjusted by two controls, Trim and Fader.
This two-stage architecture is identical to the
topology of large mixing consoles and provides a great deal of
control. Trim is often thought of as a coarse gain control and the
Fader as the fine gain control.
To adjust trim and fade:
1. Set Fader control to 0 dB (12 o'clock).
2. Adjust Trim control clockwise until optimal level is achieved on
metering and in headphones.
Headphone
Encoder
PFL status / Activity LED (1-6)
Pan (1-6)
PFL
(Left: 1-6,
Right: 7-12)
Fader (1-6)
Trim (1-6)
Fader (7-12)
PFL status / Activity LED (7-12)
Quick Start Guide
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