After some agony, I have a working audio system featuring a Scarlett 2i2 device. But I have not had success integrating a firewire audio interface using FFADO. Simply installing FFADO does not make it available to Pulseaudio.
As a note, this device is demonstrably supported (RME FW800) and I’ve used it in Arch.
Has anyone successfully done this in Nix?