What are the general computer hardware requirements for using DAW software? Or rather: what are the general laptop hardware reuirements? I actually have two Macs: a Mac Pro 5.1 (2010) and a Powerbook G4 (1.67GHz) but alas I don't have a permanent place to keep both my Mac Pro and my music hardware, and I have a feeling I can't do much musicwise with the old and outdated Powerbook with a PPC processor. I will likely have to upgrade to a better laptop at some stage. I haven't purchased an audio interface yet, but the Focusrite Scarlett 18i20 seems to do what I want which is to record up to 8 line inputs at once, support MIDI and be rack mountable, of course with good audio quality and reliability. The only thing I'm not sure about is if I should go for USB or Firewire. I'd normally lean towards Firewire, but having read numerous posts on the subject I hear that USB is more than good enough and more reliable than Firewire. What are your opinions? Focusrite's Saffire Pro 40 seems to be the Firewire equivalent of the USB interfaced 18i20 I mentioned above.