---
title: bufferFrameSize
framework: Core Audio
role: symbol
role_heading: Instance Property
platforms: [macOS 15.0+]
path: coreaudio/audiohardwaredevice/bufferframesize
---

# bufferFrameSize

An Int whose value indicates the number of frames in the IO buffers.

## Declaration

```swift
var bufferFrameSize: Int { get throws }
```