Help to introduce audio in a communication

Hello community I need help, I want that when I am in communication, either by WhatsApp or by phone, I can enter an audio from the application I made, which by means of a button, executes an audio file.
I basically need to mute the microphone to make way for my audio file to be sent clean.

Only ask in the community of the builder you use. I rejected your topic on the App Inventor community. It is very annoying if users ask in multiple places. It is a waste of time for users who want to help you. I hope you understand.

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OK sorry. I am a new user on the App creator site and was evaluating between different creators to work with, definitely opting for the Kodular community.
Thank you very much