When I had a carpeted amp, one of my cats would sleep on it while I played. Another cat likes to nap in my case while I'm playing. I played flute for many years, but that was not as popular as bass (except with one cat, who would sometimes sit directly in front of me while I was playing).
Years ago, I had a violin-flute-cello trio, and we would practice in my little apartment, so it would get pretty loud. But my then-cat loved it and would sleep in the violin case, even when we played discordant 20th century stuff. He eventually went to live with relatives and was a great companion to my classical music aficionado uncle. Whereas his previous cat would leave the room for 20th century music, my cat enjoyed all styles. Also, his favorite toy was a low E acoustic guitar string (modified for safety so it didn't have any pokey parts).