Version: Firmware 13.1.3 + DOS 2.2.4 Date: 2019-02-12

[IRSI]

My impression of firmware 13.1.3 – dos 2.2.4 (Audirvana - Air WiFi - Devialet) is a little more clarity and “see through”, in addition more “tightened up” in the bass. But unfortunately tonal colors and musicality are gone, no fun listening. Especially on classical music these characteristics are evident.
I tried “downgrading” to 13.0.0 – dos 2.2.2, and got the message that it was successful, but Air did not work after downgrading. So something must have been (permanently) changed during the installation of 13.1.3. Unfortunately I am not aware of any method to do a “clean install” of earlier firmware?

I noticed the same issue! The downgrade from 13.1.3 to 13.0.0 works but the DOS doesn't downgrade. It stays at 2.2.4!! So it looks like we can't go back to DOS 2.2.2. After downgrading I can't play with Roon. The player says that the device is in use!