Recording the vocal harmonies in my studio is a rare thing, thanks to tools like harmony evo. And before it, I always used vocalists and other instruments (also hardware) to be able to experiment with vocal harmonies.
SOFTWARE: Sony ACID Pro, OpenMPT / ModPlug Tracker, GoldWave, Har-Bal, Celemony Melodyne, AnalogX SayIt, E-Phonic Retro Delay, SonicCharge Permut8, SonicCharge Bitspeek, Native Instruments Guitar Rig 4, Kjaerhus Audio Classic Suite, Ichiro Toda's Synth1, AudioRealism Bassline 2, SonicCharge Synplant, Arturia V Collection, KORG Legacy Collection, Illformed Glitch 2, Antares Harmony Enginemore
Why it is the harmonizer plug-in everyone is looking for! What you hear on Imogen Heap's "Hide and Seek" is this, mixed with another vocal machine and what you hear on Bon Iver's "715 - CREEKS" and pretty much every send recording of his going forward is this, only tweaked slightly to make it possible to use it in real-time, the resulting technology named the "Messina". To me the difference between this plug-in and a lot of vocoder-like plug-ins is, that it is an electronic sound that still sounds somewhat human and organic and not like a robot (like a lot of Daft Punk stuff). So what are you waiting for? Dive into the beauty that is lush, deep and full sounding harmonizer sounds!