KVR Audio

SingInTime · Post by **SingInTime** » Mon Jul 13, 2026 6:40 am

Hi all,

I'm Stefano — musician and former sound synthesis researcher, now publishing the plugins I build for my own productions.

The first one is Duono, a mono-to-stereo widener.

One knob: width.
Allpass-based widening — no delays, no comb filtering tricks.
Perfect mono fold-down: sum the output to mono and you get your original signal back, identical.
VST3 / AU / CLAP, macOS & Windows.
Free.

I made it because I kept needing to widen mono sources (mandola, vocals, single mics) without worrying about what happens on a mono club system or a phone speaker.

Download: https://stefanobaldan.com/plugins/duono/

Feedback very welcome — this is the first release under my own name and I'd like to get the details right.

Chicken Drummy · Post by **Chicken Drummy** » Mon Jul 13, 2026 7:38 am

Cool. Thanks, Stefano!

SingInTime · Post by **SingInTime** » Mon Jul 13, 2026 9:03 am

Here's a demo of how it works:

Duono — free mono-to-stereo widener with perfect mono fold-down (VST3/AU/CLAP, Mac/Win)