It is a two step process. First import the MP3 file into the Audio track of Band-in-a-Box. Second access the new Audio Chord Wizard through the Audio Editor.

I found two video tutorials on YouTube. +++ First +++ is a ten minute PG Music tutorial. +++ Second +++ is a thirty five minute tutorial by user Henry Clarke.

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Import MP3 into Band-in-a-Box

Jim Fogle - 2025 BiaB (Build 1128) RB (Build 5) - Ultra+ PAK
DAWs: Cakewalk by BandLab (CbB) - Standalone: Zoom MRS-8
Laptop: i3 Win 10, 8GB ram 500GB HDD
Desktop: i7 Win 11, 12GB ram 256GB SSD, 4 TB HDD
Music at: https://fogle622.wix.com/fogle622-audio-home