QUOTE(supermomolvl2 @ Mar 7 2017, 08:47 AM)
For my in-law case, yes. Literally they have to shout to make sure the whatsapp audio clear

I have done some testing on audio recording using the in-built app, looks like the so called aggressive ambient sound reduction algorithm is trying to reduce continuous sound effect such as music and cut off certain low-end frequency so your voice is heard clearly.
You can try like a feet away from the phone while recording voice, and it's quite clear, but when recording music, it's like putting the mic underwater. At the same time, if there's a slight peak frequency sound, such as mouse click, machine's beep sound, swirling fans (high pitch) will be recorded as well. Male's voice of which has much lower mid may get cut off, but mine seems fine.
I hardly do any recording myself but finds this issue with Oneplus 3 on whatsapp as well (yes, OP3!!), but Note 7 (was, returned) has pretty much non-existence, it seems Samsung has done a better job?