---
title: kMultiChannelMixerParam_PrePeakHoldLevel
framework: audiotoolbox
role: symbol
role_heading: Global Variable
path: audiotoolbox/kmultichannelmixerparam_prepeakholdlevel
---

# kMultiChannelMixerParam_PrePeakHoldLevel

The peak hold level of the channel, prior to the mixer, in decibels.

## Declaration

```swift
var kMultiChannelMixerParam_PrePeakHoldLevel: AudioUnitParameterID { get }
```

## Discussion

Discussion Input and output scope. This is a read-only property. Use the value of this constant to read the left channel and its value+1 to read the right channel.

## See Also

### Constants

- [kMultiChannelMixerParam_Enable](audiotoolbox/kmultichannelmixerparam_enable.md)
- [kMultiChannelMixerParam_Pan](audiotoolbox/kmultichannelmixerparam_pan.md)
- [kMultiChannelMixerParam_PostAveragePower](audiotoolbox/kmultichannelmixerparam_postaveragepower.md)
- [kMultiChannelMixerParam_PostPeakHoldLevel](audiotoolbox/kmultichannelmixerparam_postpeakholdlevel.md)
- [kMultiChannelMixerParam_PreAveragePower](audiotoolbox/kmultichannelmixerparam_preaveragepower.md)
- [kMultiChannelMixerParam_Volume](audiotoolbox/kmultichannelmixerparam_volume.md)