Web audio api

I am wanting to do a project where I use something like a raspberry pi with the web audio api to do multi channel sound. The web audio api lets you to sound synthesis in the browser and it has 5.1audio functionality but I’m new to raspberry pi or similar platforms and I would like to know if it is possible to do. Can you use HDMI? If so does volumino talk to the web audio api and connect it to HDMI or to a USB port to talk to a multichannel dac?

Thanks PMc