---
title: kAudioFormatParameterValueStream
framework: coreaudiotypes
role: symbol
role_heading: Global Variable
path: coreaudiotypes/kaudioformatparametervaluestream
---

# kAudioFormatParameterValueStream

A key that specifies the A side-chain of float 32 data that an audio unit provides for sending high-density parameter value control information, and uses no flags.

## Declaration

```swift
var kAudioFormatParameterValueStream: AudioFormatID { get }
```

## Discussion

Discussion An audio unit typically runs a parameter value stream at either: The sample rate of the audio unit’s audio data. An integer quotient such as a half or a third of the sample rate of the audio. The mSampleRate field in the AudioStreamBasicDescription structure describes this relationship.

## See Also

### Format identifiers

- [kAudioFormat60958AC3](coreaudiotypes/kaudioformat60958ac3.md)
- [kAudioFormatAC3](coreaudiotypes/kaudioformatac3.md)
- [kAudioFormatAES3](coreaudiotypes/kaudioformataes3.md)
- [kAudioFormatALaw](coreaudiotypes/kaudioformatalaw.md)
- [kAudioFormatAMR](coreaudiotypes/kaudioformatamr.md)
- [kAudioFormatAMR_WB](coreaudiotypes/kaudioformatamr_wb.md)
- [kAudioFormatAppleIMA4](coreaudiotypes/kaudioformatappleima4.md)
- [kAudioFormatAppleLossless](coreaudiotypes/kaudioformatapplelossless.md)
- [kAudioFormatAudible](coreaudiotypes/kaudioformataudible.md)
- [kAudioFormatDVIIntelIMA](coreaudiotypes/kaudioformatdviintelima.md)
- [kAudioFormatEnhancedAC3](coreaudiotypes/kaudioformatenhancedac3.md)
- [kAudioFormatFLAC](coreaudiotypes/kaudioformatflac.md)
- [kAudioFormatLinearPCM](coreaudiotypes/kaudioformatlinearpcm.md)
- [kAudioFormatMACE3](coreaudiotypes/kaudioformatmace3.md)
- [kAudioFormatMACE6](coreaudiotypes/kaudioformatmace6.md)