Pianos should be 40-46%, depending who you talk to. I’m in the 42% camp.
I personally use a Dampp-Chaser as a supplement to humidity control in my piano room. People here have mixed opinions on using one.
Then there is the reality. At our old house, I had 46% (compromise with the guitars) year round. But at the new house, if it gets above 38% in the dead of winter in Minnesota, mold grows on the windows. My piano shows no issues at that lower level, so it’s been around 34-36% and my piano seems to actually prefer it.
You can control your room however you want, but based on what you said, I don’t think you need to even worry about it at all. (50-60% is too high, though.)
Humidity too high causes felts and wood to absorb moisture and swell, corrosion on metal parts and strings, sticky keys, etc. Too low causes cracks and loose pins after many years. But it doesn’t have to be exact, and different pianos respond differently.
Pianos survived hundred(s) of years without home climate control. Maybe they didn’t last as long or sound as good, though!
I do music stuffsYep, I have a YouTube channel!
1998 PETROF Model IV Chippendale
LEGO Grand Piano (IDEAS 031|21323)
2017 Charles Walter 1500 in semi-polish ebony
1991 Kawai 602-M Console in Oak