How can I inject audio as input file to google assistant in android device using appium?

Why dont you use some text to speach engine. Connect a speaker to the PC automate the TTS page in browser and make it utter the words you need keep both speaker and device close then syncronize same with the app automation.

Hi Prajith_KP,
Yes I have tried this but this is not the ideal solution for my project.Thanks for sharing your idea.