Is it possible to stream audio (e.g. MP3) while disabling the microphone?

[grokify]

Some WebRTC solutions allow playing back an audio file while disconnecting the microphone. Can this be done with RingCentral web phone SDK?

It seems like the following code will work for generic WebRTC:

• https://stackoverflow.com/questions/25532200/webrtc-play-audio-input-as-microphone
• https://github.com/eelcocramer/webrtc-mp3-stream

[kirill-konshin]

SDK is a wrapper on top of SIP.JS, which is a wrapper on top of browser's WebRTC, so technically it should be possible. Need more specific requirements.

[grokify]

There are a couple of use cases:

• Announcements: In this use case, an employee should be able to dial an extension to select a pre-recorded message to playback over a PA system. For WebRTC, the scenario would be to have an IVR end up at an extension, have an app listen for calling on that extension and then programmatically call a PagingOnly extension and play back the pre-recorded message. One way to do this would be using Chrome in headless mode.
• Voicemail Drop: In Voicemail Drop, when a caller reaches a voicemail system, the person can select a pre-recorded voicemail message to play. In a server-powered scenario, the user will be able to play a message from the cloud and drop off the call to engage in a different call. Before that is available, if we can do it on the client side, the user can move on to other activities, including another call if multiple lines are available.

In both of these scenarios, a server-side would be nice but a WebRTC solution could speed delivery.