Never hardwood, carpet gets you a level playing field to get the other acoustics right. Go with a very heavy padding. Get a carpet with a 'cut pile', not a 'loop'.
Hardwood floors in basement music room?
I currently have carpet over concrete, and I'm thinking about removing the carpet and installing engineered hardwood over a glued down underlayment, does anyone have any pro or cons on this. The underlayment I was going to use is a lumber liquidator product called Eco silent sound HD, they also have a cork underlayment .