Applies to: Scarlett 2nd/3rd Generation 6i6, 18i8, 18i20 + Clarett
Many users want to use their interface for Live streaming programs like Skype or other VOIP programs.
Most VOIP programs are only able to send a single Mono Stream to the Internet, so they are restricted to the first input on any audio device.
Usually with a built in microphone on your computer you never notice this because even though it records in two channel the two microphones are so close to each other their signals are identical.
Some select programs may be able to address the first two Inputs and send in Stereo to the Internet, so if this is the case you can alter these settings to create a Stereo Mix rather than a Mono Mix.
You can use the Mix feature on these interfaces to create a Mix Minus. This will blend your Inputs into one Mono Signal which you can route back to Input 1 so that Skype can receive it.
To do this:
- In Focusrite Control, under Mixing & Routing, choose an output to use in Mono, such as Line output 3.
- For Line Output 3 set this to a custom mix in order to choose what we'd like to send to this output.
In Line output 3 make sure Hardware Input 1 is Muted and Turned down. This will avoid a nasty feedback loop. Also remove any software playback from this mix so the person you're contacting can't hear themselves.
Use Inputs 2 and onward for the XLR Mic Inputs or 1/4" Line Inputs or Instrument Inputs. You can add this into your custom mix on the right and label these accordingly.
Plug the TRS 1/4" cable from the Line Output at the back and into Input 1 on the front.
Raise the Gain Knob to the proper level where there is a strong signal, with no clipping. Half way is around Unity Gain.
Then set Skype, or other VOIP software, to the Scarlett 18i20.
You can now use the Custom Mix of Line Output 3 to mix the live Conference. If one person or instrument is much louder than another naturally this can be useful.
For a guide on how to do this with interfaces that use Mix Control, Scarlett 1st Gen and Saffires, please see this article: