Whew, very openended question RokQ. First Real Band is a "music studio" program. You don't need anything else. Pro Tools, Garageband or Real Band are all Digital Audio Workstations or DAW's. There's certainly differences between them but they're all esentially the same. You can record, mix and finalize audio and midi tracks. The big difference with Real Band is it will open and play Biab songs. So, you're all set. Biab only has one audio track available so if you want to record more than one like your guitar and vocal then you need Real Band. RB is much better for recording anyway in my opinion. Just read some of the threads in the RB forum. Lots of posts talking about what interface to use and how much they cost plus you can read all about how RB works.

The other thing is your computer. A Pentium D is fairly old but depending on the system you may be able to have 2 gigs of ram. If you don't have that much already I would add some. No need to get it from Dell, you're out of warranty anyway so no harm in opening up the case and sticking in more ram if you can. Ram is very cheap for older PC's, like $20 or so.

Have fun,

Bob

Biab/RB latest build, Win 11 Pro, Ryzen 5 5600 G, 512 Gig SSD, 16 Gigs Ram, Steinberg UR22 MkII, Roland Sonic Cell, Kurzweil PC3, Hammond SK1, Korg PA3XPro, Garritan JABB, Hypercanvas, Sampletank 3, more.