[General] Sounds attacking with a unit

[WaerercraftKillers]

How to add 3d gun sounds when a unit is attacking?

 

[Hermit]

You could do it with triggers, or like this Open a model in the Model Editor.
First go to Windows > Sequence Manager, open the attack animation, copy the first Interval (Number, where it says From: xxxx).
Next, go to Windows > Node Manager, right click on the blank space below all of the bones, attachment points, collision shapes and event objects and pick "Create Event Object".
A new object will appear. Open the new object, right click on the "Event Tracks" space, pick "Create New", paste the starting interval of the attack animation, OK.
Then, make sure the "Type" is set to "SND (Sound)" and choose the sound you want to add in the "Data:" field.
Since you said you want gun sounds, I would suggest you to use "KGYR - GyrocopterAttack" or "KRIF - RiflemanAttack1".
When you are done, save the model and import.

What's the triggers then? Oh and I want it mui

Oh come on, It's really not that hard.

 

[WaerercraftKillers]

What's the triggers then? Oh and I want it mui

Well it dosen't appear 3d sounds though

 

[Hermit]

Well it dosen't appear 3d sounds though

They are in the database, but you don't even have to find them, you can just enter their four letter "shortcut" in the third empty field, just below the "Data" field. (KGYR or KRIF in this case).
If you need additional info, just ask. Oh and you could also read this tutorial.