OH! Ha... I got a totally wrong definition... It's DSKvirtuoso, which is quite good, but I ran it through a filter (can't remember which one) and the vintage delay plugin. There is a chance it might be the head phones, but I do like making my stuff sound lo-fi, so it might just be my track. The trac...
Thanks for commenting, but by "sonority", do you mean specific usage of accents on notes or overall volume mixing?
Sorry, I had to google the term.