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Not an expert at all in anonymizing audio, but I suspect anything “off the shelf” to mask your voice may be easy, or at least easy for experts, to undo. I would suggest instead to use a TTS engine and mask that instead. Here’s a list of decent - from my now ancient experience - TTS engines you may be able to use: https://linuxhint.com/command-line-text-speech-apps-linux/

Regarding uploading without leaking your IP - you could use Tor, but ensure javascript is disabled and/or you completely trust the server you’re uploading to, lastly some people would advise that Tor has been long compromised, but take that with a grain of salt and wait for others with more recent knowledge/experience chime in.

You must delete metadata from the file too.

It depends who you’re trying to hide from, and what their capabilities are.

Here is a way that Tor or VPNs can fail you, even if you’re only trying to hide from an adversary much weaker than the NSA/GCHQ/etc.

Suppose you simply want to hide your identity from your university (or perhaps a fellow student who works in the IT department there) when you upload a video from your dorm room - eg, using the university’s network. So, you use Tor or a VPN to upload to a peertube instance. For the sake of this scenario, lets say that the university is unable to convince the peertube instance operator to tell them the IP address where the video was uploaded from, so they don’t even know that Tor or a VPN was used. How could the university deanonymize you?

By linking two pieces of information that they do have access to:

1. They’ve seen the video, so they know its approximate filesize and they know the approximate time it was uploaded.

2. They also most likely are retaining netflow data for all connections on their network.

Netflow data is the number of bytes sent and received for each TCP or UDP 4-tuple (source and destination IP address and port number) in every time interval. The time resolution might be as high as sub-second or could be as low as 1 minute. But, even if it is very low resolution (like 1 minute), you’re probably the only person on the network who sent the approximate amount of data at the approximate time.

Thinking about the above scenario might help you mentally model what you would need to do to resist stronger adversaries. An easy way to defeat the university adversary would be to not upload the video using their network. If you’re considering a state level adversary, you can’t really do that - they could be keeping netflow data (or even “full-take” - the content of all packets) at any ISP, and we know that they are at many (see XKeyscore, Tempora, etc).

You could use some public wifi, but, where? Is there a CCTV camera at that cafe? Did you bring your phone, which is sharing your location with various advertising companies? Did you leave your phone at home, but suspiciously turned it off for the first time in a long time during the very hour the video was uploaded?

Even for a single anonymous video publication, this is an extremely hard problem if you want to consider state-level adversaries. To maintain anonymity over time while continuing to publish under a persistent pseudonym is even harder. There are no easy answers. Hopefully the scenario above will help you in your threat modeling :)

Anonymous, and people who make Anon videos use a voice synthesizer (like Hawking, Siri, etc) so that there is no human fingerprint to it, but fsociety videos from Mr. Robot use human voices. YouTube has some guides that will show you how to do similar effects with Audacity. Just YouTube search for “audacity voice distortion.”

Voice changer can be cracked once you know the used algorithm, I am mention it in case you try to do some shady stuff.

As for the question to avoid leaking your IP, normal VPN will do.

just squeeze ur throat a little tight and speak more high pitch

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