How to listen to recorded voice memos on a Kia Ceed car stereo?

How can I listen to recorded voice memos from my MP3 player on my Kia Ceed Car stereo - it is currently not recognising the recording file from the MP3 player|||Not all MP3 players are 100% compatible with car stereos - some only give limited functionality %26amp; access to basic file types %26amp; formats. You could ask your local Kia dealer, but unless it's as simple as using the player's controls to select %26amp; play the memo, you may not be able to do this through the car.|||If it is not recognising it then it is in the wrong format or possibly at the wrong bit rate.