У вашего броузера проблема в совместимости с HTML5
I describe how to use a Voice Pitch Analyzer app and other feminization techniques. The links are found below.
Voice Pitch Analyzer app:
https://play.google.com/store/apps/details?id=de.lilithwittmann.voicepitchanalyzer
Caroland voice technique videos (3):
https://www.youtube.com/channel/UCgJRU_vOK5Tts7XEW4Qw4fA
Head voice and falsetto:
https://youtu.be/qxQOespT4Bs