You want to know which audio files are playing.. correct?
So when adding a "play audio" event you can set a tag for that specific audio file.
Then you can find out if that audio tag is playing using the condition: audio "tag" is playing.
Imagine using 1 tag for all audio files.
Than you can access all these audio files using that specific tag.
Set their volume.
Make stop playing.
Setting effects etc.
Example.
2 audio files playing use tag "gunshot".
1 audio file playing uses tag "bomb".
You can check audio: is "gunshot" playing-->set playback rate to 1.2
Etc.
Does this answer your question?
I understand but my problem is not that.
My sounds are played with a different label each, the name of the label is its file name.
File -> shotPlayer.ogg
tag -> "shotPlayer"
File -> enemyKilled.ogg
tag -> "enemyKilled"
etc...
I have a sound played in a loop throughout the game.
I need to know when you're playing that sound only and no more.
For what?.
When other sounds playing, then I must turn down the volume of the sound played in loop.
When no sound except the sound playing loop, then I must increase its volume.