Live "retranslation" from microphone to speaker (megaphone-like)

Question

as I could not find a suitable app in the Play store, I want to try coding it myself.

I need a plain vanilla megaphone under Android (4.1 and later):

as I speek into the headset, I want the audio "stream" to be spoken through the loudspeaker - in realtime, without any intermittent recording, streaming etc.

Is this "megaphone functionality" directly supported through APIs?

Is there any example app (with or without sourcecode) with retranslation functionality that I might have missed?

Thanks,

Michael

Answer 1

You can do this with the API functions, but not without buffering/streaming to the speaker. You basically have to route what you get from AudioRecord into an AudioTrack. You can probably find code examples of this online.

As for the "ready-to-use" part, asking for 3rd-party recommendations is off-topic here. You may want to remove/rephrase that. Otherwise, your question is a target for closure.