---
title: inputParameters
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avmutableaudiomix/inputparameters
---

# inputParameters

An array of input parameters for the mix.

## Declaration

```swift
var inputParameters: [AVAudioMixInputParameters] { get set }
```

## Discussion

Discussion The array contains instances of AVAudioMixInputParameters. You don’t need an instance for each audio track that contributes to the mix. By default, the system processes audio for those tracks without an associated AVAudioMixInputParameters instance. warning: Specifying multiple AVAudioMixInputParameters for the same track has undefined behavior. Use only one instance per track in an audio mix.