There are two types of commercial audio loops, those that have metadata embedded in the loop and those that don't.

Before Band-in-a-Box (BiaB) can alter the pitch or timing of an audio loop the loop must have embedded metadata for reference. This type of audio loop is sometimes called a groove clip, audio warp, acidized loop or acidified loop (to honor the first software capable of embedding metadata, Acid). The embedded metadata typically includes tempo, beats and pitch information. You can find out more +++ HERE +++. Band-in-a-Box uses this data to correctly pitch or time shift the audio.

Loops that do not have embedded data can not be automatically pitch or time shifted. Some program will allow a loop to be manually changed but I have not tried this in 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