Mix Control or Focusrite Control for bus-powered Scarletts

1st & 2nd Gen: Scarlett Solo | Scarlett 2i2 | Scarlett 2i4

No, these devices are not compatible with Scarlett Mix Control or Focusrite Control. All the controls for these devices are hardware-based instead (i.e. accessible from the front panel of each device).
To change buffer size and sample rate, go to the audio preferences in your DAW (Mac) or open the ASIO Control Panel application on your Windows PC.

Yes, you need Focusrite Control for these devices. You can download Focusrite Control from your Focusrite account, or the downloads page (select the correct product i.e. Scarlett Solo 3rd Gen, Scarlett 2i2 3rd Gen, etc).

Yes, you need Focusrite Control 2 for these devices. You can download Focusrite Control 2 from your Focusrite account, or the downloads page (select the correct product i.e. Scarlett Solo 3rd Gen, Scarlett 2i2 3rd Gen, etc).