Please note that if you're using an application that includes ASIO support (e.g. Pro Tools, Ableton Live, Cubase, Studio One, Reaper etc) then all input and output channels will be available to you by default, this article may not be applicable.
Applies to Clarett Range, Saffire 6 USB, Scarlett Solo 4th Generation, Scarlett 2i2 4th Generation, Scarlett 2i4, Scarlett 4i4, Scarlett 6i6, Scarlett 8i6, Scarlett 18i6, Scarlett 18i8, Scarlett 18i20, and Vocaster range, Red Range, PCIeNX
This article refers to “ASIO” and “non-ASIO” (sometimes referred to as “WDM”) driver types. For more information about these terms, please see this article: What do the terms "ASIO" and "WDM" mean?
By default, when connecting any of the above interfaces to a Windows computer with our latest USB driver installed, a single Playback device and a single Recording device will appear in non-ASIO applications.
To expose additional channels from your Focusrite interface to non-ASIO applications (e.g. Skype, Discord, Zoom, Audacity) first click the Focusrite Notifier icon in the taskbar, then click “Expose/Hide Windows Channels”:
If Focusrite Notifier isn't showing in your taskbar, then please see this article: Why can't I see the Focusrite Notifier icon on the taskbar on Windows?
In the window that opens, you can then select any additional channels that you wish to expose to non-ASIO applications (in the example below, we'll expose Analogue Inputs 3 + 4):
You'll then be able to select those channels in your non-ASIO applications:
More information on the differences between ASIO and non-ASIO apps can be found in this article: What do the terms "ASIO" and "WDM" mean?
If you wish to configure your device to play back multichannel “surround sound” audio files, please see this article: Configuring an interface for Surround Sound on Windows.