I'll defer to someone who may actually do a lot of music editing, but I can't imagine that you'd need even 8GB. If it were video editing, or even photo editing, sure, but unless he's working with really long lossless quality music cuts, like over an hour, I don't see it being all that useful. You'd probably get more bang for the buck getting a better CPU or even a professional grade sound card compared to an extra 8GB of RAM.