I've just bought used an old AudioBox USB interface, it's probably the oldest version made. I'm getting crackling noises with just the USB cable and headphones attached. I'm thinking maybe a firmware update could fix or reduce the problem. I saw a few posts here with screenshots of firmware in the 2.xx range with most likely the same device. Mine is on v1.10 as per UC and says it's up to date. I've tried updating on MacOS, Windows 10 and 11 but all turn out the same. Can anyone confirm that 1.10 is the latest version for this unit? If not, is it possible that since it's such a legacy unit, Presonus has completely removed the firmware from downloads and is it possible to install the update without using UC? Thanks for all the help.