My Dad made it 95 years and 10 months. After he moved to Assisted Living, where he played jazz piano for his fellow residents every Tuesday and Saturday’s. They gave him a nickname that he cherished, “Jazzman Gus”. he lived on the 2nd floor and even though there was an elevator he always took the stairs. He would say, “The stairs keep you healthy!” Growing as a kid my dad walked everywhere with the car parked in front of the house and I walked with him and had to learn how to keep up.
Perhaps you could start with your father-in-law introducing him to music using headphones, or earbuds, getting his ears closer to the music. It may take a while to find a genre that he responds to but I would start with perhaps music of his younger days that may bring back memories of a bygone era for him.
Like my dad did with my uncles, we could always talk music. He from back-in-the-day and me introducing him to the music of the day that still had character.
My Dad passed-away listening to his favorite music with me by his side. The greatest gift he gave me was the love of music!…

