# Detect if event has no instruments
**URL:** https://qa.fmod.com/t/detect-if-event-has-no-instruments/16766
**Category:** Unity
**Created:** [February 16, 2021, 3:12pm UTC](https://qa.fmod.com/t/detect-if-event-has-no-instruments/16766 "2021-02-16T15:12:15Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@PoleaxeGames](https://qa.fmod.com/u/PoleaxeGames)
#### Post date: [February 16, 2021, 3:12pm UTC](https://qa.fmod.com/t/detect-if-event-has-no-instruments/16766/1 "2021-02-16T15:12:15Z")
I am porting Empire of Ember to use FMOD. Empire of Ember already has all sounds assigned using Unity’s AudioSource, however I want to be able to port certain audio situations to use FMOD instead. If for an event there is no assigned instrument, I need to be able to tell that in code to continue to use Unity’s AudioSource.
How do I tell if an event has no assigned instruments?
---
### Author:  [@richard\_simms](https://qa.fmod.com/u/richard_simms)
#### Post date: [February 22, 2021, 4:48am UTC](https://qa.fmod.com/t/detect-if-event-has-no-instruments/16766/2 "2021-02-22T04:48:21Z")
You are only able to detect this within the FMOD Studio application. You can have something like the following code in the Window \> Console dialog to search each event’s timeline & parameter sheet for instruments.
```auto
var allEvents = studio.project.model.Event.findInstances();
allEvents.forEach(function(event) {
var allSheets = event.parameters;
allSheets.push(event.timeline);
var allModules = [];
allSheets.forEach(function(sheet) {
allModules.push(sheet.modules);
});
var merged = [].concat.apply([], allModules); // The Javascript version provided in FMOD Studio does not allow for array.flat()
if(merged.length <= 0) {
console.log("Event '" + event.name + "' does not contain any instruments");
}
})
```
You can then use this information to tell Unity which events to use the original AudioSource.