Firmware 12.3.0 + DOS 2.2.2

[Hifi_swlon]

And just because people say there isn't a difference doesn't necessarily mean that there isn't one.

Of course.

But the point is, in terms of listening alone, it’s not always obvious which is the case - particularly where subtle changes are ‘heard’.

I hear changes in my system often. Is it the mains quality, atmospheric pressure, ear sensitivity, mood, tiredness, or some other physical factor that has changed? Or completely imagined? Who knows.

Just to be clear I don’t have the CI so haven’t heard any of those firmwares. But I do recall hearing non-Pro firmware differences in the era when Devialet actually released them. Looking back I wonder how much was really there, and whether I could pick the different versions out under controlled conditions. In general it always kind of sounded the same over prolonged periods.