If you, for any reason, want to change the voice on an audio recording, then you can use the following online service.
Manual:
1. Go to the website https://voicechanger.io/
2. Select “Upload audio” to upload the finished audio file.
3. After loading, in the window that opens, select the sound you need (alien, monster, etc.)
4. Wait about a minute while the system processes the voice.
5. Listen to the finished recording.
6. Click on the three vertical dots to the right of the recording and select “Download” to download the audio to your device.
Also, the service provides the ability to voice the text and allows you to use a microphone directly on the site to record.
NOT TESTED BY ME