How to save an audio text from the Message+ app as an mp3 file?

I have an LG K4 using the Verizon Message+ app. My daughter sent me an audio text and I want to save it as an mp3 file. When I press and hold the text the only save option is to the Gallery, which doesn't support audio. Any suggestions? Thank you for taking the time to respond.

from Android Forums at AndroidCentral.com - Ask a Question //forums.androidcentral.com/showthread.php?t=765740&goto=newpost
via IFTTT