Let's not forget: privacy is not a sign of wrongdoing.

Some friends wanted to make a podcast, and asked me to join. I agreed under the condition that I could use a real-time voice changer, because I didn't want my real voice publicly on the internet. That's one legitimate use case. Maybe OP is calling a support number, which often monitor and record your calls. OP could also just be calling a friend, you never know who could be listening in.

In any case, voice changers are just software. It's not creepy unless you know for sure it's being used for something creepy. Anything can be used for good or bad.

When I lost my job, someone I knew at the C level in a different industry put me in touch with a guy closer to my field. After we introduced ourselves he said,

"After hearing X describe you, I was expecting a deep bass voice."

The conversation faltered after that.

Yeah, yeah, you can write the guy off for being superficial, but I'm the guy who needed the favor, and all the help I could get.

First impressions matter. I'd absolutely have used a voice alteration tool to make my voice deeper on interviews; people respond differently to bass.

i heard that hackers are spam calling people when the victim picks up the phone they record voice samples which are used later to impersonate them and spam family members. this could add a layer of protection for all unknown contacts

Meh, I'm down for it. The spam calls have been collecting voice data and using it to commit crimes. Might as well protect myself

A few years ago, the UK Justice Minister called for a ban on the sale of tiny, lipstick-sized mobile phones that came with a voice-changing function built in. (Article) They were being smuggled into prisons and the convicts were using them to commit crimes from the inside, including making intimidating phone calls to witnesses etc.

What a sad day that would be for legitimate rectally-insertable, voice-changing cellphone enthusiasts!

nice

I really want to try this, now.