Difference between revisions of "Audio Interface - Mixing Bench"

From Help Wiki
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This lab has a '''MOTU 828mk3''' audio Interface which has multiple inputs and outputs.  Unfortunately, the order and labeling of the inputs and outputs in the audio applications can be confusing.
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This lab has a '''Apollo x8''' audio Interface which has multiple inputs and outputs.   
  
 
== Inputs ==
 
== Inputs ==
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* There are two '''XLR/1/4"''' mic/instrument inputs on the front.
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* On the front there are two HI-Z inputs inputs (labelled '''HI-Z 1''' and '''HI-Z 2''')
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** Microphones can be connected to theses inputs with XLR cables.
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** Theses are for low level signal like electric guitars.  Only use mono 1/4 cables.
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** Guitars can be connected with 1/4" cables.
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* There are 4 XLR mic inputs on the back of the interface.
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** There is a panel with 4 XLR jacks below the interface.
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** These are connected to the 4 mic inputs.
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** Microphones can be connected to these inputs using XLR cables (not included in the room).
 
** Each input has:
 
** Each input has:
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*** '''Trim''' control knob for setting levels
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*** Trim control knob for setting input levels
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*** '''Pad''' for reducing input levels
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*** Pad for reducing input levels
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* There are eight 1/4" line level inputs on the back.  
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*** 48V Phantom Power for powering condenser microphones
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** '''Inputs 1 and 2''' are connected to the patchbay.
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*** Low cut filter.
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** The '''main outputs''' of the mixer are connected directly to inputs 3 and 4.  
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* There are eight 1/4" line level inputs on the back.
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** The other inputs are not being used.
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** Theses are not connected to anything  
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** Do not connect or disconnect cables on the back.
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== Outputs ==
 
== Outputs ==
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* There are two XLR '''Main outputs''' on the back.
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* Outputs 1 and 2 are connected to the '''Mackie Big Knob volume box'''.
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** Theses are connected directly to the '''Mackie Big Knob''' '''volume box input A'''.
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* The other outputs are not being used.
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* There are eight 1/4" line level outputs on the back.
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** '''Outputs 1''' and '''2''' are connected to the patchbay.  
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** The other outputs are not being used.
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** Do not connect or disconnect cables on the back.
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== Labeling ==
 
== Labeling ==
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=== Inputs ===
 
=== Inputs ===
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* '''Mic/Instrument''' inputs come before the line inputs.
 
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* This makes the numbering of the analog inputs confusing.
 
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** For example analog input 1 is input 3.
 
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{| class="wikitable"
 
{| class="wikitable"
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|'''MOTU Inputs'''
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|'''Apollo Inputs'''
 
|'''Software Labe'''l
 
|'''Software Labe'''l
 
|-
 
|-
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|Mic/Instrument 1
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|Mic/Line/Hi-Z 1
 
|Input 1
 
|Input 1
 
|-
 
|-
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|Mic/Instrument 2
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|Mic/Line/Hi-Z  2
 
|Input 2
 
|Input 2
 
|-
 
|-
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|Line 1
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|Mic/Line 3
 
|Input 3
 
|Input 3
 
|-
 
|-
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|Line 2
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|Mic/Line 4
 
|Input 4
 
|Input 4
 
|-
 
|-
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|Line 3
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|Line 5
 
|Input 5
 
|Input 5
 
|-
 
|-
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|Line 4
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|Line 6
 
|Input 6
 
|Input 6
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|-
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|Line 7
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|
 +
|-
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|Line 8
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|
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|-
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|Line
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|
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|-
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|AUX 1 L
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|
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|-
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|AUX 1 R
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|
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|-
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|Virtual 1
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|
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|-
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|Virtual 2
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|
 +
|-
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|Virtual 3
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|
 +
|-
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|Virtual 4
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|
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|-
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|AUX 2 L
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|
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|-
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|AUX 1 R
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|
 
|}
 
|}
  

Revision as of 14:44, 15 September 2023

This lab has a Apollo x8 audio Interface which has multiple inputs and outputs. 

Inputs

  • 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.
    • Theses are not connected to anything  

Outputs

  • Outputs 1 and 2 are connected to the Mackie Big Knob volume box.
  • The other outputs are not being used.

Labeling

  • 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.  

Inputs

Apollo Inputs Software Label
Mic/Line/Hi-Z 1 Input 1
Mic/Line/Hi-Z 2 Input 2
Mic/Line 3 Input 3
Mic/Line 4 Input 4
Line 5 Input 5
Line 6 Input 6
Line 7
Line 8
Line
AUX 1 L
AUX 1 R
Virtual 1
Virtual 2
Virtual 3
Virtual 4
AUX 2 L
AUX 1 R

Outputs

  • The Main outputs come before the line outputs.
  • This makes the numbering of the analog outputs confusing. 
    • For example analog output 1 is output 3.
MOTU Outputs Software Label
Main Out 1 Output 1
Main Out 2 Output 2
Line 1 Output 3
Line 2 Output 4
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