---
title: AUParameter
framework: audiotoolbox
role: symbol
role_heading: Class
path: audiotoolbox/auparameter
---

# AUParameter

An object that represents a single audio unit parameter.

## Declaration

```swift
class AUParameter
```

## Topics

### Querying Parameter Properties

- [minValue](audiotoolbox/auparameter/minvalue.md)
- [maxValue](audiotoolbox/auparameter/maxvalue.md)
- [unit](audiotoolbox/auparameter/unit.md)
- [unitName](audiotoolbox/auparameter/unitname.md)
- [flags](audiotoolbox/auparameter/flags.md)
- [address](audiotoolbox/auparameter/address.md)
- [valueStrings](audiotoolbox/auparameter/valuestrings.md)
- [dependentParameters](audiotoolbox/auparameter/dependentparameters.md)

### Managing Parameter Values

- [value](audiotoolbox/auparameter/value.md)
- [setValue(_:originator:)](audiotoolbox/auparameter/setvalue(_:originator:).md)
- [setValue(_:originator:atHostTime:)](audiotoolbox/auparameter/setvalue(_:originator:athosttime:).md)
- [setValue(_:originator:atHostTime:eventType:)](audiotoolbox/auparameter/setvalue(_:originator:athosttime:eventtype:).md)
- [string(fromValue:)](audiotoolbox/auparameter/string(fromvalue:).md)
- [value(from:)](audiotoolbox/auparameter/value(from:).md)

### Initializers

- [init(coder:)](audiotoolbox/auparameter/init(coder:).md)

## Relationships

### Inherits From

- [AUParameterNode](audiotoolbox/auparameternode.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSCoding](foundation/nscoding.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [NSSecureCoding](foundation/nssecurecoding.md)

## See Also

### Parameters

- [AUParameterGroup](audiotoolbox/auparametergroup.md)
- [AUParameterNode](audiotoolbox/auparameternode.md)
- [AUParameterTree](audiotoolbox/auparametertree.md)