At least this message "Battery is low, the aircraft will return to the home point in 10 seconds" can be played back with an echo on a Samsung Galaxy S8 in DJI GO 4, if you do this:
Settings > Sounds and vibration > Sound quality and effects > Concert hall = On.

In my humble opinion, this makes that message sound pretty cool.
I don't know why the other spoken messages are not played back with an echo, perhaps a tech savvy person has an explanation for this phenomenon.

Do you have a sound clip maybe?

Eagle_Eye Posted at 2017-9-2 03:38
Do you have a sound clip maybe?

No, I don't.