Voice using on web

Hello, i am CEO of howisland. I am a little bit confused about TTS on web so my question is

If we have a well-trained voice and wish to make it the default voice for our users, can we “install” or “load” the voice as SpeechSynthesisVoice in browsers that allow speech synthesis?

If not, what is the preferred or best-practice approach? Set up an external service, synthesise on demand, and return the resulting audio?

i don’t know. even it doesn’t work on Digirano.