When using dubbing channels like F5-TTS, CosyVoice, GPT-SoVITS, or Fish-TTS in video translation software, if the reference audio is AI-generated, the result can be frustrating: it sounds messy and completely unlike the clear, natural voice you'd expect.
Many online users have complained about this issue, especially when using AI-generated speech as a reference, the results are far less stable than with real human recordings. What's going on? Don't worry, let's discuss the reasons and solutions!
Why Does This Happen?
AI Voices Have a Unique "Flavor"
AI-generated speech (like that synthesized with other TTS tools) may have unique "digital artifacts," such as odd tones or a synthetic feel. These may not be obvious to our ears, but to another AI (TTS tool), they're like "noise," which can confuse it.Hidden "Acoustic Fingerprints"
Some AI voice tools secretly add "markers" (similar to watermarks) to prevent piracy or track the source. This watermark might be a high-frequency signal that humans can't hear, but the TTS tool may "stutter" when analyzing it, resulting in a garbled voice.AI Isn't Good at Imitating AI
Many TTS tools are trained on real human speech, and they are good at imitating human voices. But when they encounter AI-generated speech, because the patterns are a bit different, they get confused. It's like asking someone who can only draw cats to draw a dog – the style is likely to go astray.
What Can Be Done?
Choose a Real Human Recording as a Reference
If possible, use a real human voice recording directly, as it's the most stable and easiest for TTS tools to process.Pick a Reliable AI Audio
If you can only use AI-generated audio, choose one that sounds natural and free of noise. You can use audio software to process it slightly and remove potential interference.Adjust the TTS Tool's Parameters
Some tools allow you to change the pitch, speed, or emotion. Try different settings to find the right one; the sound may improve.Try a Different Tool
Different TTS tools have different levels of adaptability to AI audio. If the current channel doesn't work, switch to another; you might be surprised.
TTS Tips and Tricks
- Shorter Sentences Are More Reliable: Keep the input text as short and clear as possible; long sentences are more likely to cause AI errors.
- Reference Audio Should Be Clean: Use real human recordings and avoid AI-generated or watermarked audio.
- Try Multiple Times: If the effect isn't good, change the audio or rewrite the text. Don't be afraid to experiment.
- Read the Manual: Check if the tool supports AI audio and choose the right tool to save effort.
AI-generated reference audio may confuse TTS tools due to "artifacts" or watermarks, resulting in a garbled voice. The best solution is to use real human recordings.