---
title: Creating an Audio Server Driver Plug-in
framework: coreaudio
role: sampleCode
role_heading: Sample Code
path: coreaudio/creating-an-audio-server-driver-plug-in
---

# Creating an Audio Server Driver Plug-in

Build a virtual audio device by creating a custom driver plug-in.

## Overview

Overview This sample shows how to create a minimal Audio Server plug-in. Written in standard C, the sample provides the minimal implementation you need to publish a single, functioning audio device to the system. The audio device provides the following features: Configurable device primary volume, muting, and data sources 44.1 kHz and 48 kHz sample rates Two channels of audio I/O in 32-bit, floating point, linear PCM format Install the sample’s .driver bundle to /Library/Audio/Plug-Ins/HAL and reboot your computer. Use Audio MIDI Setup to inspect the newly installed device.

## See Also

### Drivers

- [Building an Audio Server Plug-in and Driver Extension](coreaudio/building-an-audio-server-plug-in-and-driver-extension.md)
- [Capturing system audio with Core Audio taps](coreaudio/capturing-system-audio-with-core-audio-taps.md)