VST vs AU Plugins: Which One Should You Use?
In the world of digital music production, plugins are essential tools that allow producers to shape their sound, mix tracks, and bring creative ideas to life. Two of the most common plugin formats you’ll encounter are VST (Virtual Studio Technology) and AU (Audio Units). But what’s the difference between them – and which one should you use?
Let’s break it down.
What Are VST and AU Plugins?
VST Plugins (Virtual Studio Technology)
Developed by Steinberg, VST is a widely supported plugin format used for virtual instruments (VSTi) and effects (VSTfx). It’s compatible with many DAWs (Digital Audio Workstations) across both Windows and macOS.
AU Plugins (Audio Units)
AU is Apple’s proprietary plugin format, designed specifically for macOS and iOS. It integrates deeply with Apple’s audio ecosystem and works seamlessly with DAWs like Logic Pro, GarageBand, and MainStage.
Compatibility: The Dealbreaker
Your choice might already be made based on the DAW and operating system you use.
| Plugin Format | Operating System | Works With |
| VST2/VST3 | Windows, macOS | FL Studio, Ableton Live, Cubase, Reaper, etc. |
| AU | macOS only | Logic Pro, GarageBand, MainStage |
Note: Logic Pro only supports AU plugins. If you’re a Logic user, AU is your only option unless you use a plugin wrapper (which can be clunky)
Performance and Integration
AU Plugins
- Better integration with macOS-native DAWs like Logic Pro and GarageBand.
- Lower CPU usage in some cases due to tighter system integration.
- Consistent UI appearance in Apple-based environments.
VST Plugins
- More cross-platform and DAW-agnostic.
- Massive ecosystem with thousands of free and paid plugins.
- VST3 offers dynamic I/O configuration, better automation, and improved performance.
Plugin Availability
The VST format has been around longer and is supported by a broader range of developers. You’ll often find that:
- Most plugin developers release VST and AU versions of their products.
- Some niche or indie plugins may only be available as VST.
- Free plugins are more commonly released in VST format.
Use Case Scenarios
| User Type | Best Plugin Format |
| Logic Pro/GarageBand User | AU (only compatible format) |
| Ableton, FL Studio, Reaper User (on Mac or Windows) | VST |
| Cross-platform Producer (switches between Mac & PC) | VST |
| iOS Music Maker (using GarageBand on iPad) | AUv3 |
Conclusion: Which One Should You Use?
- If you’re on Logic Pro or GarageBand, AU is your only choice, and it works great.
- If you’re using any other DAW, VST is likely the way to go.
- If you use both Windows and macOS, stick with VST plugins for maximum compatibility.
