User Manual

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).

Refer to the top panel illustration for control names and numbers mentioned below.

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 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 channel's 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 speakers).

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 (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 only (Console or DAW).

What Next?

Refer to the Apollo Software Manual to learn how to conﬁgure the audio interface set-

tings, use the Console application and Realtime UAD Processing, and more.