You may be right that the best strategy to get the highest quality stem might be to try several of these stem-splitting programs. Although I most use Song Master Pro, in one test Studio One produced a better-sounding bass track. The tone was fuller -fatter.

I have not repeated the test yet by selecting the four-instrument split in Song Master Pro. Indeed, it has two more tracks by default and perhaps reducing the number of tracks (now an option) improves the audio quality.

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.