Advice on atmospheric/haunting vocals please?

[DJ Chug]

Hi, any idea what effects or processing is used to achieve those eiry haunting vocals in liquid like

The intro to ...
Forsaken - Alix Perez

The vox throughout - Mohican Sun - Sudden Change

Thanks!

 

[Leniz]

Sudden change sounds a bit lile vocodex

 

[Clod.com]

Yaled