Welcome to the forum, T.S. I don’t know how to reverse engineer a song in .WAV form. It’s equivalent to unbaking a cake to get back to sugar and flour etc.

You must have exited BIAB without saving the file ‘normally’ Are you sure you did that, and overlooked the warning##?

Assuming you did, your best bet is to put your effort into recreating the song in BIAB. You could get partway there by loading it into the ACW (File, Open Special, Launch Audio Chord Wizard) utility that come free with BIAB. This will get you closer with chords and tempo (and you already know the song name!).

## unless BIAB doesn't give a warning when a song is saved in another form; something I want to check

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.