Practical cybernetic soundtracks? Dreamtonics may have made this possible:
Vocoflex is not the same as the popular TTS or voice cloning technology RVC-Boss/GPT-SoVITS.

Vocoflex exists as a plug-in and runs in your DAW. Supporting VST3 and AU formats as well as AAX, Vocoflex provides real-time voice deformation technology that you can put on any vocal track or modify and quickly switch your voice in real time while you sing.