The most important thing about this overview is that you are never caught or questioned about how you sound in-game, in essence, 99.9% passing. I will go more into depth to make sure you NEVER get caught or question is a bigger guide, for now I'm only introducing this technology.

Before we start, let's go with Requirements, if you don't meet these, unfortunately, don't bother:

1.- Gaming PC with a 1070 or higher. 2.- Studio/streaming level microphone.

There's currently only 2 available voice changers and another 1 in closed alpha

1.- Voice.ai (Free) https://voice.ai/r/GsWMc (yes it is my link but it gives me points for more voices, not money or anything like that)

2.- NyVox ($10 a month): https://www.patreon.com/NyVox/

3.- Metavoice (close alpha): https://themetavoice.xyz/

Starting with Voice.ai, currently the most powerful one, it has a higher latency than NyVox and a variable latency (depending on your setup and load) but it is for a good reason, it prioritizes quality because when PC resources are maxes in NyVox the voice sounds like TTS and guess what happens next, you get caught. NyVox by itself is not that recommended by me anyway but that will be something to elaborate further down.

Here is an example of the power of Voice.ai in this regards: https://streamable.com/2ujhdg (all those voices are made By Selystria, she is a mod in the voice.ai discord)

Nevertheless, many of us are still not satisfied with the output, of the problems: It's too clear and too clean, doesn't sound like somebody speaking into a mic, some of the folk in that discord have come up with a solution which is called a "bad mic filter", you can check instruction to use said filter in setup and troubleshooting channel of that discord. Another way was to simply go to the VB cable settings and set the setting down towards (telephone quality) however that is no longer possible with their new audio driver.

Next is NyVox, I credit it as being the first actual Voice AI changer that is accesible to anybody, however it's model is now outdated and has really poor pitch tracking, one of the things it does best in my opinion was spanish (for some reason that the developelor could himself figure out).

So far it was only partially passable, too many players called me out while using it. Never use VRChat as a benchmark, people there are too nice and will not go out of their way to "call out" anybody for anything, I've used far harsher environment with the most toxic communities I could get my hands on: Tactical shooters.

Example of NyVox (spanish and english): https://vocaroo.com/1gbxMaFR6ELz

Finally, there's metavoice, as an alphatester, all I can say is it's too weak to even recommend trying it, their next model seems promising, but until then they only get an honorable mention. They also prioritize latency which causes some issues that will require a whole new post to explain why that is.

In summary:

Voice.ai: 95%+ passing, reaching closer to 99% passing with bad mic filter enabled.

NyVox: 70%-80% passing with the right voice

Metavoice current model: 30% passing and down to 10% if you are playing a game (because it prioritizes latency just like NyVox it will degare into TTS-level speech or worse)

How to maintain each software running at near 100% performance is a post for another time (will require a secondary gaming PC), but for those enthusiastic enough about this technology, it won't be an obstacle.