This is my Fuchs & Möhr upright from the garden hut. Obviously a bit out of tune. I use this piano (the real acoustic one) for most of my recordings on my channel: https://www.youtube.com/@tomguder
Very nicely recorded full samples for an Upright-piano.
It can compete with some Grand-Piano soundfonts.
Yes, there are variable tuning rates in some keys, starting from almost a few tens of cents higher and ending up a few tens of cents lower. But this may depend more on the condition of the strings or felts.
