Greetings DelMismoRacimo and welcome to the forum!

I do not remember previously encountering Band-in-a-Box rendered MP3 not following tempo changes so more information about the program, your computer and the song file would be helpful.

It would be VERY useful to store the song file online (Google Drive, OneCloud, Box, Dropbox, 4Shared all offer free online storage) and provide a link to the song file so we can examine the file and possibly duplicate the issue since it is so unusual.

Have you tried rendering the song file as a wave file? If that works then that would indicate an issue with the MP3 encoder you're using.

As Charlie mentioned, you can record the audio in real time as a workaround but that doesn't answer the question of why the problem is happening. To know the answer to that question we need more information.


Jim Fogle - 2024 BiaB (1111) RB (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