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Apollo Twin X Hardware Manual Quick Start 18
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).
Refer to the Top Panel illustration for the control names and numbers mentioned below.
Caution: Before proceeding, lower the volume of the monitor speakers and remove
headphones from your ears.
Set Input Gains
1. Select the input channel to be adjusted by pressing the PREAMP button (7) until
the Channel Selection Indicator (3) displays the channel (CH1 or CH2).
2. Select the input type (mic or line) by pressing the INPUT button (13-a) until the
Input Type indicator (5) displays the desired input jack* (see note below).
3. Adjust the channel's gain by rotating the LEVEL knob (1) until the input meter for
the channel (4) approaches maximum, but does not reach the red clip LED when
the loudest input signal is present. If the level is too high to avoid clipping (when
the red “C” LED illuminates), enable the PAD (13-d).
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 (11) until the Monitor Selected (8) or Headphone Selected (10)
indicator is lit.
2. Set the volume level by carefully increasing the LEVEL knob (1) until the desired
volume is reached (you may need to adjust the volume of the speaker system).
3. To set the other output volume (monitor or headphone), repeat steps 1 – 2.
Mute (and Unmute) Monitor Outputs
1. Select the Monitor outputs by pressing the MONITOR button (11) until the
Monitor Selected (8) indicator is lit.
2. Press the MUTE button (13-l) to mute the monitor outputs. The Monitor Selected
Indicator (8) is red when the monitors are muted. When in MONITOR Mode, the
Volume Level Indicator LEDs (2) are also red.
3. To toggle the monitor mute state, press the MUTE button (13-l) whenever Monitor
(8) is selected.
Notes:
• *The 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 (14) on the front panel.
• To control both channels simultaneously when a stereo source is connected, press
the LINK button (13-f) when an input is selected (3).
• Line outputs 3 & 4 are accessed and controlled via software only (Console or DAW).
• Refer to the Apollo Software Manual to learn how to configure the audio interface
settings, use the Console application and Realtime UAD Processing, and more.
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