Apollo x8 Interface

We have Apollo x8 interfaces installed in the four Music Tech Labs, both Audio Mixing Benches and the 5.1 room.

Intro

We have Apollo x8 interfaces installed in the four Music Tech Labs, both Audio Mixing Benches and the 5.1 room.
They are multichannel interfaces with
- HI-Z inputs for guitars
- Mic inputs with XLR jacks
- Line inputs with 1/4" jacks
The interfaces and software were configured to work in the various labs.
The Music Tech labs make use of more inputs and outputs of the interface.
The Audio Mix Benches are set up in a similar way to make moving between labs easier.
Not all of the inputs and outputs are connected in the various labs.

On the front there are two HI-Z inputs inputs (labelled HI-Z 1 and HI-Z 2)
- Theses are for low level signal like electric guitars. Only use mono 1/4 cables.
There are 4 XLR mic inputs on the back of the interface.
- There is a panel with 4 XLR jacks below the interface.
- These are connected to the 4 mic inputs.
- Microphones can be connected to these inputs using XLR cables (not included in the room).
- Each input has:
  - Trim control knob for setting input levels
  - Pad for reducing input levels
  - 48V Phantom Power for powering condenser microphones
  - Low cut filter.
There are eight 1/4" line level inputs on the back.
The four microphone inputs and the eight line inputs share only 8 channels of analog-to-digital conversion, so the first four channels can only be set to either mic or line, not both at the same time.

Input: toggles between MIC and LINE for the current input.
Low Cut Filter: Enables a filter with a cutoff frequency of 75 Hz with a slope of 12 dB per octave.
- Affects Mic, Line and HI-Z inputs
+48V: Press to turn on phantom power.
- When pressed the light will flash red.
- When the red light is solid phantom power is enabled.
- Only use with condenser mics.
Pad: When enabled, the channel’s XLR Mic input signal level is attenuated by 20 dB.
- Does not effect the Line or Hi-Z inputs.
Polarity: Inverts the phase of the input by 180 degrees.
- Leave off
Link: Links the preamp controls of adjacent preamp channels together.
- 1 and 2 and 3 and 4
- Only the same types of inputs can be linked.
  - Mic/Mic or Line/Line
  - Does not work HI-Z inputs

The various audio applications may refer to the inputs and outputs with slightly different names.
We have tried to set the preferences to meaningful names but sometimes they may revert back to the default names.
Below are table with the list of the inputs and outputs
Some are physical inputs and outputs and others and virtual connections from the UA Console app.

Software Label	Notes
Mic/Line/Hi-Z 1	Switches between HI-Z, Mic and Line jacks
Mic/Line/Hi-Z 2	Switches between HI-Z, Mic and Line jacks
Mic/Line 3	Switches between Mic and Line jacks
Mic/Line 4	Switches between HI-Z, Mic and Line jacks
Line 5	Line Input 5
Line 6	Line Input 6
Line 7	Line Input 7
Line 8	Line Input 8
AUX 1 L	Aux 1 from the Console app
AUX 1 R	Aux 1 from the Console app
Virtual 1	Virtual connection between audio apps
Virtual 2	Virtual connection between audio apps
Virtual 3	Virtual connection between audio apps
Virtual 4	Virtual connection between audio apps
AUX 2 L	Aux 2 from the Console app
AUX 2 R	Aux 2 from the Console app

Software Label	Notes
Line 1	Line Output 1
Line 2	Line Output 2
Line 3	Line Output 3
Line 4	Line Output 4
Line 5	Line Output 5
Line 6	Line Output 6
Line 7	Line Output 7
Line 8	Line Output 8
MON L	The monitor output of the Console app. The headphone jacks get their signal from this output.
MON R	The monitor output of the Console app. The headphone jacks get their signal from this output.
Virtual 1	Virtual connection between audio apps
Virtual 2	Virtual connection between audio apps
Virtual 3	Virtual connection between audio apps
Virtual 4	Virtual connection between audio apps
CUE 1 L	Cue 1 from the Console app
CUE 1 R	Cue 1 from the Console app