I know that Helix SHOULD be able to do this ... just can't work it out by myself ... I am preparing a Brian May tribute that should be opener to my band's show. And I would love to start with something close to the sounds, Brian May came up with and which up to now, nowone I know was able to copy. It is these sound games that start in this video at about 2:40 ...
https://www.youtube.com/watch?v=inhExqvtztE
In the 80ies I had the luck to meet Brian himself and ask him, how he did this and he answered: with an Eventide Harmonizer, whose output was going directly into the PA (NOT into his AC-30s!). Well, obviously there's more to this. For instance he seems to do some pitch shifting with a pedal and there seems to be a decent portion of delay included either.
All of this equipment IS included in the helix, the delay, the eventide and the possibility to separate the signal and route it through a special output going directly to the FOH mix ... Still I can't work it out how to even get close to this sound. One problem that baffles me is for instance: how does Brian get a feedback without using his AC-30s?? Whenever I am playing the HELIX directly over FOH with monitors I NEVER get any feedback at all ... And mind, he's doing it live as well, not only in studio.
Any help here would highly be appreciated.