You’ve asked a really wise question.

I build all my computers, and their primary function is for music programs especially including BIAB.

The CPU is very important for regenerating RealTracks. Don’t skimp there.

The graphics card is relatively not very important in digital audio.

I highly recommend a SSD boot drive, and put the BIAB program on it. The RealTracks can stay on the supplied USB drive but if you can give them a separate internal hard drive, I recommend that.

Tougher question: RAM. At this time BIAB is a 32-bit program and itself doesn’t benefit from more than 4 GB. However, if you have large software synths BIAB can use JBridge to access more RAM if you have it.

To prevent RFI, I only use wired mice and keyboards for music, and I keep the router away from the PC.

I am careful not to run power cables in parallel with line level or mic cables.

And we haven’t even talked about an audio/MIDI interface outside the box, decent monitors and a room without lots of square surfaces and windows.

Does this help?

BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.