Use bluetooth headset for calls, but only use phone's microphone.

[AC Question]

I would like to connect to my bluetooth headset but use the phone's microphone (not the bluetooth microphone). The headset includes a microphone for phone calls, but it works really poorly. I want to use the microphone on the phone itself, while listening via the bluetooth headset.

Any way of doing this?

Some people might suggest the app "soundabout" but I don't see a configuration option in soundabout to do this.