Steinberg released the original VST3 specification in 2008. The specification is now up to version 3.6. It is difficult for programmers and developers to implement a constantly moving target and that is what VST3 has been since it was released.

Because of this some programs do not accept VST3 and many developers release VST2 as well as VST3. Roland may be using some feature that only VST3 offers. Otherwise I can not think of any reason they wouldn't release both VST2 and VST3 versions of Zenology.


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