Basically, try to make your voice sound like the target voice, and the engine will add some effects to make it sound like the real thing. Another random tip: You’ll need to talk relatively slowly if you’re using any of the “echo-ey” voices. Otherwise, the echos will make it hard to understand.
This free online pitch shifter tool allows you to change the pitch of audio files (mp3 or wav format), without affecting the tempo. You can also save pitch shifted files as an mp3. To begin, click the “choose file” button to select the audio file from your computer that you would like to pitch shift.
Change voice on recordings and online
1. Voice Changer – upload a recording of your speech and select the desired voice change effect. There is a real-time recording function right on the site.
2. Online Tone Generator – worse, without changing the voice in real-time, but with a bunch of settings. You can edit the voice in the file.
3. Voice Changer (Android) is a free voice changer app for Android users.
4. Voice Spice – a simple recorder that allows you to record a voice, changing the tone and volume in real time or setting ready-made settings in order to imitate the speech of a man, woman, robot, space squirrel, hellish demon, and so on.
5. Voice Changer Plus (iOS) is another free voice app.
6. TurboTel – Telegram client with the function of changing the voice when sending an audio message.