Difference between revisions of "Audio Interface - Mixing Bench"

Revision as of 15:28, 4 March 2022

This lab has a MOTU 828mk3 audio Interface.  It has multiple inputs and outputs.  Unfortunately the order and labeling of the inputs and outputs in the audio applications can be confusing.

Inputs There are two XLR/1/4" mic/instrument inputs on the front. Microphones can be connected to theses inputs with XLR cables. Guitars can be connected with 1/4" cables. Each input has: Trim control knob for setting levels Pad for reducing inout levels There are eight 1/4" line level inputs on the back.   Inputs 1 and 2 are connected to the patchbay. The main outputs of the mixer are connected directly to inputs 3 and 4.   The other inputs are not being used. Do not connect or disconnect cables on the back.

Outputs There are two XLR Main outputs on the back. Theses are connected directly to the Volume Control Box. There are eight 1/4" line level outputs on the back. Outputs 1 and 2 are connected to the patchbay.   The other outputs are not being used. Do not connect or disconnect cables on the back.

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 Mic/Instrument inputs come before the line inputs. This makes the numbering of the analog inputs confusing. For example analog input 1 is input 3. MOTU Inputs Software Label Mic/Instrument 1 Input 1 Mic/Instrument 2 Input 2 Line 1 Input 3 Line 2 Input 4 Line 3 Input 5 Line 4 Input 6

Outputs The Main outputs inputs 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