We have an outbuilding on the property with an old garage (with an extra room next to it) that we don't use/won't be using. Considering converting it for the above use for our son, but it needs to be soundproofed to avoid driving the neighbors insane (not everyone likes hard rock).. Additionally, there's the issue with acoustics...
Has anyone done this before, who has tips and suggestions? Is it feasible to do it on one's own?