Setting Hardware I/O Levels - Universal Audio Apollo Twin Hardware Manual

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
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. When the input signal is present, 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. 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
tings, use the Console application and Realtime UAD Processing, and more.
Apollo Twin USB Hardware Manual
for control names and numbers mentioned below.
to learn how to configure the audio interface set-
16 Chapter 2: Quick Start