Tell them to piss off.Thal
If you are not breaking any rules, the only compromise you could do is to ask them if there's a specific time they would prefer you to play or not to play (within reason, not what they suggested) and then consider if it's doable for you.The house has rules that you are not allowed to make noise after 10 pm or before 7 am. Still I've made slightly stricter rules for myself to never play with the acoustic before 9 am (even later on weekends) or after 9 pm.
Just to answer some questions.
Just to add a couple.You live in an apartment, I take it.Is your piano an upright? Where is the back of it - on your common wall or on another purely internal wall(ie, one that backs onto somewhere in your own apartment)?
start practicing at 3 in the morning and see how they like that. just out of curiosity what kinds of pieces are u practicing?
But to play devils advocate I might have started practicing Beethoven's 5th about a week ago which was probably the straw. I don't feel bad. I'm sure they appreciate the Bach sessions now.
What about being mature to begin with, that is, go and speak to them. Perhaps some direct communication is all that it takes.Plan B: get a digital for the hours they don't want you to play. Or check if you can move your piano in order to make it less disturbing.
I wrote a reply note saying I will not be able to comply to your time frame, but I will try to be more mindful on the weekends and if they have anymore concerns to feel free to talk to me at the front rather than through the walls. I have not received a reply. Direct communication at this point would do no one any good as I am still angry.