From the Help:
Explanation of the Extension that Band-in-a-Box adds for you

- If the song has a melody, the extension will begin with M (otherwise S).

- The second letter of the song name is G.

- The third letter is the style of the song (1-9 and A-N for built in styles and U for a User style).


BIAB & RB2025 Win.(Audiophile), Sonar Platinum, Cakewalk by Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Kontakt, Focusrite 18i20, KetronSD2, NS40M Monitors, Pioneer Active Monitors, AKG K271 Studio H'phones