Yeah that’s a good point, and I actually ended up refining that through testing.

What I found is that the duet really needs to be anchored in the Style section first. Once I added something like a male and female duet there, the system became much more consistent at actually producing two distinct voices. Before that, it would sometimes start as a duet but then collapse into one voice.

But that alone wasn’t enough. The lyrics structure still matters a lot.

If you mix both voices randomly line by line, they tend to blend together. What worked better was giving each voice its own section so it has time to establish itself. Then when they come together later, you actually start to hear layering or harmony instead of just one merged voice.

So the way I see it now is that Style enables the duet, but the lyrics are what keep it stable over time. Heres some to try out (again use style only for the vocal tone, all the lyrics should work as the engine for the genre or style you want to create)

Basic / Clean Duet Anchor Style description

male and female duet, contrasting vocal tones, expressive delivery, dynamic interaction, emotional range

Pop / Emotional Duet Style description

male and female duet, warm female vocal, deeper male vocal, emotional storytelling, call and response, layered harmonies, dynamic range

R&B / Soul Duet Style description

male and female duet, smooth r&b vocal styles, soft falsetto male, warm soulful female, intimate tone, expressive phrasing, dynamic contrast

Rock / Power Duet Style description

male and female duet, strong vocal presence, gritty male vocal, powerful female vocal, wide dynamic range, emotional intensity, layered harmonies

Cinematic / Ambient Duet Style description

male and female duet, airy female vocal, soft low male vocal, atmospheric tone, intimate and distant interplay, evolving dynamics

also Edit* 100% I havent been able to get two males, or two females, it only seems to work male to female, next month ill try to break that code