I second this comment. There are a few of these old complexes that have a light grey exterior with balconies, and they’re all cinder block construction with good sound dampening. Look at Crystal Plaza, Crystal Towers, the Buchanan, and any others that look similar. Possibly Crystal House too, but I’m not certain, they have a brick facade so I don’t know if they were built the same way. Just note, there’s significant demolition/construction on 20th and 23rd st near Crystal Drive for the next year at least probably. I make electronic music and haven’t had a complaint that I know of.