---
title: physicalFormat
framework: Core Audio
role: symbol
role_heading: Instance Property
platforms: [macOS 15.0+]
path: coreaudio/audiohardwarestream/physicalformat
---

# physicalFormat

An AudioStreamBasicDescription that describes the current data format for the stream. The physical format refers to the data format in which the hardware for the owning device performs its IO transactions.

## Declaration

```swift
var physicalFormat: AudioStreamBasicDescription { get throws }
```