How to play audio on line during a call?

S

swcalc2018-08-26 21:04:12

Android

swcalc, 2018-08-26 21:04:12

Hello, there is a task to accept an incoming call and play an audio message so that the subscriber on the other end can hear it, of course ..
Similar functionality has been cut on Android to solve the problem without going beyond one device.
At the moment, a stray is used, consisting of headphones with a microphone and an audio signal fed to it from a computer.
The question is, is it possible to simplify everything to emulate a bluetooth or wifi microphone with an audio signal and connect it to the device? (There is still a problem, if you transfer audio directly from the phone to the microphone, feedback occurs, the sound is muffled, apparently noise reduction).

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ipswitch, 2018-08-26
@swcalc

Hmmm...I would think about a USB modem with voice functions.
https://susorov.ru/huawei-e1550-%D0%BA%D0%B0%D0%BA...
www.calloffice.ru/Article/gsm_modemy
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