Apollo Twin Hardware Manual
Chapter 2: Quick Start
19
Setting Hardware I/O Levels
This section explains how to set input gain levels for the hardware inputs (mic, line, and
Hi-Z) and adjust volume levels for the hardware outputs (monitors and headphones).
Important:
Before proceeding, lower the volume of the monitor speakers and re-
move headphones from your ears.
Set Input Gains
1. Select the input channel to be adjusted (1 or 2) by pressing the Preamp button
(9) until the Channel Selection Indicator (3) displays the channel (CH1 or CH2).
2. Select the input type (mic or line) by pressing the Input Select button (11a) until
the Input Type indicator (5) displays the desired input jack* (see note below).
3. Adjust the preamp gain by increasing the Level knob (1) until the input
meter for the channel (4) approaches maximum but does not reach the red clip
LED when the input signal is present. If the level is too high to avoid clipping
(when the red “C” LED illuminates), enable the pad (11).
4. To set the input gain for the other input channel, repeat steps 1 – 3.
Adjust Output Volumes
1. Select the output volume to be adjusted (monitor or headphone) by pressing the
Monitor button (10) until the Monitor Selected (6) or Headphone Selected (8)
indicator is lit.
2. Set the volume level by carefully increasing the Level knob until the desired vol-
ume is reached (you may need to adjust the volume of the monitor speakers).
3. To set the other output volume (monitor or headphone), repeat steps 1 – 2.
Mute/Unmute Monitor Outputs
1. Select the Monitor outputs by pressing the Monitor button (10) until the Monitor
Selected (6) indicator is lit.
2. Press the Level knob (1) to mute the monitor outputs. The Volume Level Indicator
LEDs (2) are red when the monitors are muted and Monitor is selected (6).
3. To toggle the monitor mute state, press the Level knob (1) whenever Monitor (6) is
selected.
Notes:
• *Hi-Z input is automatically selected, overriding the channel 1 Mic and Line
inputs, when a ¼” mono TS (tip-sleeve) plug is connected to the Hi-Z Instrument
jack (12) on the front panel.
• To control both channels simultaneously when a stereo source is connected, press
the Link button (11) when an input is selected (9).
• Line outputs 3 & 4 are accessed and controlled via software (Console or DAW).
What Next?
To learn how to use the Console application for setting software levels, monitoring, Re-
altime UAD Processing, and/or configuring the audio interface for use with the operating
system or a DAW, refer to the
