---
title: metaParameters
framework: phase
role: symbol
role_heading: Instance Property
path: phase/phasesoundevent/metaparameters
---

# metaParameters

The object’s meta parameters.

## Declaration

```swift
var metaParameters: [String : PHASEMetaParameter] { get }
```

## Discussion

Discussion Each meta parameter contained in this dictionary affects only the sound event instance when you change the parameter’s value at runtime. As a read-only dictionary, the framework sets the contents based on the parameter you pass into a node definition initializer, for example, init(switchMetaParameterDefinition:). The dictionary key is the identifier of the source PHASEMetaParameterDefinition. tip: To propagate a metaparameter change to multiple sound events instead of just one, register the metaparameter globally by calling registerGlobalMetaParameter(metaParameterDefinition:). To change its value, access the metaparameter through the asset registry’s globalMetaParameters dictionary instead.

## See Also

### Configuring Mixers and Metaparameters

- [mixers](phase/phasesoundevent/mixers.md)