In the early days of RealTracks, PG Music hired people to do transcriptions. I can tell you, mine were spot on. The MIDI accurately matched the audio when played together. I can't vouch for others, though.

I did electric guitar and sax parts, and the hardest task was matching bends and scoops in MIDI. All you can do is a bunch of short notes to simulate one. The rest was straightforward enough. I assume they have better software now to do this job, but the process is still proprietary.


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; Presonus 192 & Faderport 8, Royer 121, Slate VSX, Adam Sub8 & Neumann 120 monitors.