Selecting audio output device

Hello Web Audio folk –

Working on a Audiology related application, I need to have the ability from our web application to select when to output sounds to a device connected to speakers or to a device connected to headset.

This feature seems to be useful for music apps where a DJ may want to control both headset and speakers, or where someone has multiple speakers set in multiple rooms, connected to different audio devices (sound cards).

This feature can also help in educational apps where a teacher can control what to output to a single student headset and to the whole classroom speakers.

I did not found any trace of discussion around use cases requiring output device selection. Did I missed them?

Philippe Cohen