Sped up voices have pretty terrible ring to it (or am I just imagining this?)

[corneliusroemer]

Sped up voices have pretty terrible ring to it (or am I just imagining this?). At least the 1.1 has this issue, not sure about 1.01.

Maybe this is an issue with the upstream OpenAI models?

Here are various speeds, created like this:

ospeak "Which voice do you prefer?" -v shimmer -m tts-1-hd -x 1.1 -o 11.wav 

These were converted with ffmpeg -i 1.wav 1.mp4 so I can upload to Github issue (click to open in browser audio player)

1x speed: https://github.com/user-attachments/assets/d3b1cf69-2a56-40aa-a59f-61bb814f4478

1.01x speed: https://github.com/user-attachments/assets/11a6be73-4c80-490e-8005-6b983cb5a770

1.1x speed: https://github.com/user-attachments/assets/552e7882-d906-4525-88d7-e2118788b6aa

original wavs in zip folder: Archive.zip