‘recording music’ is a very specific application. What software do you intend to use and which platform do they run on?
The data rate for stereo sound recording is quite low compared to HD video. I have 486’s that can do a downtown job on .wav audio.
Well, in a ideal world, ProTools, but we’re not even in that solar system, so it would depend. We are currently using Cubase.
Also, Lexicon Omega ASIO