I’m looking to put an effect similar to speaking through a gas mask on some recorded dialog, something like Psycho Mantis in Metal Gear Solid.
Any ideas how to approach it? I’m guessing that equalization will get me a lot of the way there, but I haven’t found a curve that gives good results. Will I need to run it through a different filter?
The vocoder is probably the closest I’ve gotten to the right sound, but the effect isn’t consistent… it shifts and changes over the course of the recording. It also sounds quite unnatural, which isn’t what I’m aiming for. Maybe there’s a settings combination that mitigates this?
That thread has some good tips for radio/telephone-style equalization, which will be handy, but it’s not the right sound for this.
Nearest I can get at short notice is an astronaut helmet effect …
Remove all frequencies below 300Hz (using equalizer).
Apply David Sky’s comb filter: frequency 444Hz, decay 0.04
Then leveller on “light”, ( leveller is in Audacity’s effect menu ).