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I have built a text to speech system that is generating speech for a given text, however the generated audio has a lot of vibrations in it. Although the speech is clear, it doesn't really sounds natural and is a bit robotic.
Here is a sample of the generated audio: Audio
Please give some suggestion on how I can clean this audio and make it sound more natural.
It seems like your sample rate is very low. That is handy for keeping sizes low, but it ruins the output (unless you like robot speech)
Try higher quality samples and a much higher sample rate.
