I was making a version of the old Bee Gees "How do you mend a broken heart" the other night, and to get really tight vocals i recorded thru my TC Helicon Voice works box with Only one voice active, and the lead voice muted, i recorded a 3rd, and a fifth to separate tracks, and then mixed and blended. Sometimes your own voice starts to sound bad in some songs and it takes a bit of tweaking, like gender, and huminizing to get it right, but for Bee Gees since they were brothers the familiar tones lending to Voice works nicely.

HP Win 11 12 gig ram, Mac mini Sonoma with 16 gig of ram, BiaB 2025, Realband, Reaper 7, Harrison Mixbus 9 32c , Melodyne 5 editor, Presonus Audiobox 1818VSL, Presonus control app.