How to Use Plugins Live on Mac
The same plugins you use in the studio can run on stage, with low latency and without crashing the show. This guide covers what you need, how to set it up and what to avoid.
Running live plugins is no longer just for big tours. A Mac with Apple Silicon has plenty of power for dozens of channels with EQ, compression, de-essing and effects. What separates a smooth show from one full of clicks is the setup: buffer size, interface, plugin choice and a Mac that's ready for the stage.
What you need
- A Mac with Apple Silicon (M1 or newer) and 16 GB of memory or more. More cores mean more channels with plugins.
- A Core Audio compatible audio interface with enough inputs and outputs for your show. It can be a USB or Thunderbolt interface, or your console's expansion card.
- AU or VST3 plugins installed and licensed on the Mac.
- Software built for live mixing. A studio DAW can work, but it wasn't designed for scenes, DCAs, monitor mixes and quick changes in the middle of a show.
Three ways to connect the Mac to your system
- Mac as the main console. The interface takes the mics, the Mac mixes everything and sends outputs to FOH and monitors. It's the simplest setup and gives you the most control.
- Mac as an insert rack. The console keeps mixing, but sends some channels to the Mac through the expansion card or an interface, and gets them back processed. Good if you only want plugins on lead vocals and key instruments.
- Mac for effects only. The console sends aux sends to the Mac, which returns reverbs and delays. It's the safest way to start: if something goes wrong, only the effects drop out.
Set the right buffer size
The buffer size is how much audio the Mac processes at once. The smaller it is, the lower the latency and the harder the CPU works.
| Buffer at 48 kHz | Time per block |
|---|---|
| 32 samples | 0.67 ms |
| 64 samples | 1.33 ms |
| 128 samples | 2.67 ms |
| 256 samples | 5.33 ms |
For FOH, 64 or 128 samples usually works well. For in-ear monitors, smaller is better. Start at 128, run the whole show during soundcheck, and only then go lower. Total time from input to output is higher than the buffer, because it adds converters, driver and plugin latency. See the guide to live sound latency to understand each part.
Choose plugins that work on stage
- Use: EQs, compressors, gates, de-essers, saturation, and low-latency reverbs and delays.
- Avoid: linear-phase EQs, limiters with long look-ahead, noise reduction, audio restoration and real-time pitch correction on channels that feed IEMs. They can add tens of milliseconds.
- Test first: open each plugin with the whole show running and watch CPU usage. A single heavy plugin can force a larger buffer for the entire console.
Get your Mac ready for the show
- Turn off sleep for the Mac and the display during the show.
- Turn on Do Not Disturb and quit apps you won't use.
- Turn off Wi-Fi and Bluetooth if you don't need them.
- Avoid updating macOS or your plugins the week of the show.
- Use short, good-quality cables and a stable power source.
- Save the show file and keep a copy on a USB drive or another computer.
Have a plan B
Live plugins are safe when there's a way back. If the Mac is your main console, have a small backup console or an emergency analog output. If the Mac is an insert rack, know how to bypass the returns on the console. Good live software helps too: ideally it starts up muted, only passes audio once everything has loaded, and never cuts audio because of a license issue.
Where Live Rack fits in
Live Rack was built for exactly this: it turns a Mac with Apple Silicon into a live mixing console with AU and VST3 plugin racks, up to 64 channels with 8 inserts each, scenes, DCAs, groups and matrices. Processing is spread across the CPU cores, plugin latency is compensated path by path, and total latency is shown in the status bar. You can try it free for 14 days.
Frequently asked questions
Can I use plugins live without a digital console?
Yes. With an audio interface that has enough inputs, the Mac can be the console. Many engineers work this way in houses of worship, corporate events and smaller tours.
How many channels with plugins can a Mac handle?
It depends on the plugins and the buffer size. Light EQs and compressors use little CPU. Reverbs and modeling plugins use more. Test with your full show at the buffer size you plan to use.
Do I need internet during the show?
You shouldn't. Choose software and plugins that work offline once activated, and keep the Mac disconnected during the show.