---
title: componentSubType
framework: audiotoolbox
role: symbol
role_heading: Instance Property
path: audiotoolbox/audiocomponentdescription/componentsubtype
---

# componentSubType

A 4-byte code that you can use to indicate the purpose of a component. For example, you could use lpas or lowp as a mnemonic indication that an audio unit is a low-pass filter.

## Declaration

```swift
var componentSubType: OSType
```

## See Also

### Properties

- [componentType](audiotoolbox/audiocomponentdescription/componenttype.md)
- [componentManufacturer](audiotoolbox/audiocomponentdescription/componentmanufacturer.md)
- [componentFlags](audiotoolbox/audiocomponentdescription/componentflags.md)
- [componentFlagsMask](audiotoolbox/audiocomponentdescription/componentflagsmask.md)