Custom notification sound

[john_kissane]

I wanted to use a custom notification sound but the phone won't allow me to select the file & gives the error message shown in the screenshot. The sound file
was originally an mp3 file but I converted it to ogg just in case the zenfone 6 didn't like mp3's. Any suggestions for how I can use the sound?
The error comes when I use the '+' button & then the file manager to select the file location in the Notifications folder on internal storage. Original file is also attached.

[Rustylord]

If possible you could try using Google sounds, third party app, to check whether adding your own tone would work or not.
Maybe it's because your SMS.mp3 is bit lengthy.

[john_kissane]

I want to use the same sms notification sound I had on my Zenfone 5 & before than an LG G4, why would it not work on the 6? It's 10 seconds long, don't think that's exactly lengthy!

[_jis_]

Just use original sms.mp3, because ZF6 has no problems with mp3.

[john_kissane]

I tried the mp3 file first as mentioned then tried converting it to ogg but both were rejected.