---
title: gainMetaParameter
framework: phase
role: symbol
role_heading: Instance Property
path: phase/phasepushstreamnode/gainmetaparameter
---

# gainMetaParameter

A meta parameter for dynamic loudness control.

## Declaration

```swift
var gainMetaParameter: PHASENumberMetaParameter? { get }
```

## Discussion

Discussion The framework sets this property when the app specifies a meta parameter definition at initialization.

## See Also

### Controlling Playback

- [rateMetaParameter](phase/phasepushstreamnode/ratemetaparameter.md)