The Focusrite USB audio interfaces are class compliant, meaning that they work “out of the box” on Linux as audio and MIDI interfaces (although on Gen 3/4 you need to disable MSD mode first for full functionality). However, except for some of the smallest models, a kernel driver is required to access the full range of features of the interfaces.

This driver is an extension to ALSA, specifically to the snd_usb_audio module.

• Scarlett Gen 2: Supported since Linux 5.4 (bug fixes in Linux 5.14)
• Scarlett Gen 3: Supported since Linux 5.14
• Clarett+ 8Pre: Supported since Linux 6.1
• Clarett 2Pre/4Pre/8Pre USB, Clarett+ 2Pre/4Pre: Supported since Linux 6.7
• Scarlett Gen 4: Supported since Linux 6.8

Note: From Linux 6.7 onwards, the driver is enabled by default and this is the first version where the level meters work.

This repository is a fork of the Linux kernel, used for:

1. Sharing the development code before it arrives in the mainstream kernel.

2. Sharing backports for the snd_usb_audio module so that you don't have to wait for Linux 6.8 to access the Scarlett Gen 4 support.

If you want to build an entire kernel from source, check the scarlett-gen4 branch. Otherwise, visit the Releases page to download a backport of just the snd_usb_audio module, which can be built against your running kernel.

To use the controls introduced by this driver, please refer to the dedicated GUI application repository: ALSA Scarlett GUI.