The voice actually sound close to human to begin with if the timing of the notes is good. Occasionally, I need to adjust some parameters. What I've found is that it's best to have some notes that are not strictly on the beat. The timing offset helps with this. I do this by trying to replicate what I hear when I sing the words. The program is very easy to work with because everything is on display in front you.

I prefer to use the standalone version. There are others on here who like the plugin. What I do is to save the melody as a MIDI file, and then I import it into Synth V. I then create a "work in progress" kind of backing track (WAV) with BIAB and load that into Synth V. Then I just play around with the singer's notes in the program. When I'm happy, I save the vocals as a WAV file and load it into Reaper. I then work on the backing track in Reaper to get it as good as I can.

I'm guessing you'll be surprised at how easy it is to work with. A number people in PG Music's Users Showcase forum have uploaded songs that you can listen to. There's also a Synth V forum that has lots of material.

https://forum.synthesizerv.com/

The below screenshot is from the Dreamtronics store. You can buy the Pro version of the program and one voice for $151.20.

https://store.dreamtonics.com/

Attached Files (Click to download or enlarge) (Only available when you are logged in)
synth v prices 2024.jpg (29.67 KB, 65 downloads)

MY SONGS...
Audiophile BIAB 2025