I am using 32bit BIAB 2019 (634) but I have had the same issue ever since buying the RT143 pack.
The problem is subtle but it annoys me greatly as it just sounds off.
I perceive this as rhythm issue in that somehow the instruments do not always seem to play the same rhythm. This become very noticeable when I increase the volume of the piano. The instruments suddenly sound out of sync. It occurs at the beginning of a bar, especially when the chords change. It then corrects immediately again but it is definitely there.
I am not sure if this is also a problem on other styles since I mostly use this one.
What can be the cause of this issue?
EDIT: I have experimented a bit more and I slowed the tempo right down from 160 to 90, just to see. I can confirm that there is a hesitation (or perceived slowing in temp momentarily) present whenever there is a chord change at the beginning of a bar.
Last edited by berntd; 10/12/1905:24 PM.
Band in a Box Latest: ULTRA 2020 (734) on Win 10 And: MEGA 2020 (720) on Windows 7
What I suggest you do is to create a song, make sure that it plays so that the problem is easily heard, freeze all tracks, attach it an email and send it to support@pgmusic.com so that they can hear it.
In your email, outline the problem as you have above and mention about slowing the tempo to better hear it. Also, identify which bars are the best ones to listen to appreciate the problem.
Watch the mixer patch names while you change the tempo from 160 to 90 bpm. Does the instrument name stay the same or does the name include a tilde ( ~ ) symbol at the beginning of the name?
The tilde ( ~ ) symbol means Band-in-a-Box is automatically substituting a RealTrack to better match the song tempo. So if you change the song tempo and then freeze the instruments, the RealTracks may not accurately reflect your original tracks. While both the original selected RealTrack and substituted RealTrack may have the timing error it maybe easy to claim the timing error is an artifact created by stretching the tempo too much. I would not change the tempo unless you intend for the song to use 90 bpm. It confuses the issue.
The best way forward is for you to create a short sample Band-in-a-Box song, say 32 bars (1 chorus), where you can hear this problem. Save the song as an .SGU, and also render the same song to audio (.wma or .m4a file), then share a link to both of these files.
You can post links to the files using cloud storage service like Dropbox or Google drive, or you could attach the files to your forum reply using the file manager.
FWIW - thrre are a few RTs, usually synth or pad ones,that still have 'gaps' at the start of chords. Its random, so not actual chord related, so re-gens in BB, or partial track re-gens in RB can sometimes get rid of most. But it's a PITA to have to do it. Ian
Old Guys Rule.The older I get,the better I was! BB2023 ULTRA, 1013, Win 7 and 10
The instruments get out of tempo/sync/weird already while just playing the C chord. It is not just the piano as I muted that (not in this recording) and can clearly hear it with the strumming of the guitar as well.
It becomes seriously worse when the song repeats for the second chorus from bar 1. During the repeat, from bar 10 onward, it is not usable as a band in my opinion.
Regards Bernt
Last edited by berntd; 10/19/1910:32 PM.
Band in a Box Latest: ULTRA 2020 (734) on Win 10 And: MEGA 2020 (720) on Windows 7
BIAB & RB2026 Win.(Audiophile), Windows 10 Pro & Windows 11, Cakewalk Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Session Keys Grand S & Electric R, Kontakt, Focusrite 18i20, KetronSD2, NS40M, Pioneer Active Monitors.
Thanks for sharing the test files. I agree, there is clearly a problem with the timing of these 165bpm Piano and Guitar rhythm styles, which is exacerbated by being time-stretched down to 150 bpm.
We'll investigate these further. The solution I have right now is to use to the 110 bpm rhythm styles. I tested your the file and it sounds much better. Here is specifically what I did:
1. Open Song Settings, and uncheck the option to substitute RealTracks based on tempo. (this prevents it from automatically switching to the 165bpm RealTracks. FYI there is also a global setting for this).
2. Assigned RT#1791 to the Piano track and #1795 to the Guitar track.
I do not have the realtrack numbers RT#1791 and #1795 you mentioned listed in the Realtrack Asignment / picker.
Should they not come with RT143 as it appears they are needed?
I have the same issue with all the styles in RT143. In fact, I see no assignment changes on any tempo change, even with the checkbox you mentioned unticked.
They all stay assigned with Tempo 165 and the bass is tempo 140
What shall I try next?
Regards Bernt
Last edited by berntd; 10/21/1908:16 PM.
Band in a Box Latest: ULTRA 2020 (734) on Win 10 And: MEGA 2020 (720) on Windows 7
Band-in-a-Box 2026 for Windows Special Offers End Tomorrow (January 15th, 2026) at 11:59 PM PST!
Time really is running out! Save up to 50% on Band-in-a-Box® 2026 for Windows® upgrades and receive a FREE Bonus PAK—only when you order by 11:59 PM PST on Thursday, January 15, 2026!
We've added many major new features and new content in a redesigned Band-in-a-Box® 2026 for Windows®!
Version 2026 introduces a modernized GUI redesign across the program, with updated toolbars, refreshed windows, smoother workflows, and a new Dark Mode option. There’s also a new side toolbar for quicker access to commonly used windows, and the new Multi-View feature lets you arrange multiple windows as layered panels without overlap, making it easier to customize your workspace.
Another exciting new addition is the new AI-Notes feature, which can transcribe polyphonic audio into MIDI. You can view the results in notation or play them back as MIDI, and choose whether to process an entire track or focus on specific parts like drums, bass, guitars/piano, or vocals. There's over 100 new features in Band-in-a-Box® 2026 for Windows®.
There's an amazing collection of new content too, including 202 RealTracks, new RealStyles, MIDI SuperTracks, Instrumental Studies, “Songs with Vocals” Artist Performance Sets, Playable RealTracks Set 5, two RealDrums Stems sets, XPro Styles PAK 10, Xtra Styles PAK 21, and much more!
Upgrade your Band-in-a-Box for Windows to save up to 50% on most Band-in-a-Box® 2026 upgrade packages!
Plus, when you order your Band-in-a-Box® 2026 upgrade during our special, you'll receive a Free Bonus PAK of exciting new add-ons.
If you need any help deciding which package is the best option for you, just let us know. We are here to help!
Band-in-a-Box® 2026 for Windows® Special Offers Extended Until January 15, 2026!
Good news! You still have time to upgrade to the latest version of Band-in-a-Box® for Windows® and save. Our Band-in-a-Box® 2026 for Windows® special now runs through January 15, 2025!
We've packed Band-in-a-Box® 2026 with major new features, enhancements, and an incredible lineup of new content! The program now sports a sleek, modern GUI redesign across the entire interface, including updated toolbars, refreshed windows, smoother workflows, a new dark mode option, and more. The brand-new side toolbar provides quicker access to key windows, while the new Multi-View feature lets you arrange multiple windows as layered panels without overlap, creating a flexible, clutter-free workspace. We have an amazing new “AI-Notes” feature. This transcribes polyphonic audio into MIDI so you can view it in notation or play it back as MIDI. You can process an entire track (all pitched instruments and drums) or focus on individual parts like drums, bass, guitars/piano, or vocals. There's an amazing collection of new content too, including 202 RealTracks, new RealStyles, MIDI SuperTracks, Instrumental Studies, “Songs with Vocals” Artist Performance Sets, Playable RealTracks Set 5, two RealDrums Stems sets, XPro Styles PAK 10, Xtra Styles PAK 21, and much more!
There are over 100 new features in Band-in-a-Box® 2026 for Windows®.
When you order purchase Band-in-a-Box® 2026 before 11:59 PM PST on January 15th, you'll also receive a Free Bonus PAK packed with exciting new add-ons.
Upgrade to Band-in-a-Box® 2026 for Windows® today! Check out the Band-in-a-Box® packages page for all the purchase options available.
Band-in-a-Box 2026 Video: The Newly Designed Piano Roll Window
In this video, we explore the updated Piano Roll, complete with a modernized look and exciting new features. You’ll see new filtering options that make it easy to focus on specific note groups, smoother and more intuitive note entry and editing, and enhanced options for zooming, looping, and more.
Band-in-a-Box 2026 Video: AI Stems & Notes - split polyphonic audio into instruments and transcribe
This video demonstrates how to use the new AI-Notes feature together with the AI-Stems splitter, allowing you to select an audio file and have it separated into individual stems while transcribing each one to its own MIDI track. AI-Notes converts polyphonic audio—either full mixes or individual instruments—into MIDI that you can view in notation or play back instantly.
Bonus PAK and 49-PAK for Band-in-a-Box® 2026 for Windows®
With your version 2026 for Windows Pro, MegaPAK, UltraPAK, UltraPAK+, Audiophile Edition or PlusPAK purchase, we'll include a Bonus PAK full of great new Add-ons for FREE! Or upgrade to the 2026 49-PAK for only $49 to receive even more NEW Add-ons including 20 additional RealTracks!
These PAKs are loaded with additional add-ons to supercharge your Band-in-a-Box®!
This Free Bonus PAK includes:
The 2026 RealCombos Booster PAK:
-For Pro customers, this includes 27 new RealTracks and 23 new RealStyles.
-For MegaPAK customers, this includes 25 new RealTracks and 23 new RealStyles.
-For UltraPAK customers, this includes 12 new RealStyles.
MIDI Styles Set 92: Look Ma! More MIDI 15: Latin Jazz
MIDI SuperTracks Set 46: Piano & Organ
Instrumental Studies Set 24: Groovin' Blues Soloing
Artist Performance Set 19: Songs with Vocals 9
Playable RealTracks Set 5
RealDrums Stems Set 9: Cool Brushes
SynthMaster Sounds Set 1 (with audio demos)
Android Band-in-a-Box® App (included)
Looking for more great add-ons, then upgrade to the 2026 49-PAK for just $49 and you'll get:
20 Bonus Unreleased RealTracks and RealDrums with 20 RealStyle.
FLAC Files (lossless audio files) for the 20 Bonus Unreleased RealTracks and RealDrums
MIDI Styles Set 93: Look Ma! More MIDI 16: SynthMaster
MIDI SuperTracks Set 47: More SynthMaster
Instrumental Studies 25 - Soul Jazz Guitar Soloing
Artist Performance Set 20: Songs with Vocals 10
RealDrums Stems Set 10: Groovin' Sticks
SynthMaster Sounds & Styles Set 2 (sounds & styles with audio demos)
One of our representatives will be happy to help you over the phone. Our hours of operation are from
6:00AM to 6:00PM PST (GMT -8) Monday thru Friday, and 8:00AM to 4:00PM PST Saturday. We are closed Sunday. You can also send us your questions via email.
One of our representatives will be happy to help you on our Live Chat or by email. Our hours of operation are from
6:00AM to 6:00PM PST (GMT -8) Monday thru Friday; 8:00AM to 4:00PM PST (GMT -8) Saturday; Closed Sunday.