How to work with 2-way audio? Ideas?

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I have been asked to develop something with 2-way audio in a closed room between people in the room and someone out of sight (and hearing).
The audio will only be upon request, not a constant stream.
Global idea : people in the room push a button to record a short message. The person out of sight can hear te message and respond to it. It will then be played in the room again.

Currently there is allready a Pi with Pimatic in the room. It’s not a big issue to buy extra hardware (without spending hundreds of euros).
Somehow I keep thinking of something with whatsapp and sending audio messages.

Any help or ideas is appreciated

@koffienl I haven’t used it personally, but may be https://github.com/sebpiq/node-web-audio-api is something to look at. It implements a subset of the Web Audio API supported by modern browsers. Another thing to look at is https://github.com/binaryjs/binaryjs

thanks

would binaryjs be a possibility for pimatic to play sounds in the browser? (thinking of alarm and notification sounds as well as streaming of other sources like mp3 or webradio with pimatic …)

@leader21 said:

would binaryjs be a possibility for pimatic to play sounds in the browser?

Yes. If the sounds are just jingle-files to be played in the browser (in contrast to live audio stream) this should be straightforward. See the following example which streams an image from the server to the browser client - https://github.com/binaryjs/binaryjs/tree/master/examples/helloworld