How do I set alert sound when enemy is detected?

So, i've been struggling with this for a couple of weeks now and i've came close but can't figure out how to set the alert sound without it over playing or multiplying the sounds. I use a radar in my game and when the enemy enters the radar, it's suppose to play the alert sound and show a text display showing "alert". I got it to do what im aiming for kinda, but I can't get it to just play it without it multiplying the sounds or over playing. If someone can take a moment to look at my issue and help me out, I would greatly appreciate it.

Here is the link.

dropbox.com/s/boy23oyx5ihhs9m/test%20alarm.c3p

In the not overlapping condition, stop the audio.

Oh my gosh, duh. It makes sense to put a stop sound there. Thanks Plinkie! I appreciate your help!

—

I have a question. How come if there are two or more enemies on the radar, it shows only one enemy on the radar and no alert sound play?

dropbox.com/s/3mb3xu6217nwis8/test%20alarm%202.c3p

The yellow dot overlapping radar only picks one instance and probably one off screen. Picking changes when you add more than one instance. You kinda need a for each yellow dot but then it will keep looping based on current logic. You might have to find a different way of doing it. You could count the number of yellow dots overlapping radar and set a global variable to the picked count, if this number is above 0 then run the alert logic is how I would do it.

Oh alright, thanks for explaining my problem and the advice!