You could place a trigger to play a sound file, then the sound will play when the player walks into that tile.
Viewing post in Some issues regarding sound effects
I've tried using triggers and had the same problem with them still interrupting playback when I'm far away, one problem with triggers is that they can be re-triggered, if I walk back and forth on top of the trigger I'll hear overlapping sounds that didn't finish playing, and doing storyline conversations that are usually only used 1 time doesn't seem to be very well suited to triggers