Plugin Grab 
OPx-4 – Synth
- Safe & tested — no bundled junk
- Working download, no dead links
- Installs on Windows in seconds
About OPx-4
For rich, characterful tones that just works, producers trust OPx-4. Made by AIR Music Technology, this synth keeps your workflow fast and the sound pro. Control the oscillators and filters with confidence; there's no wrong way to dial it in. Ideal on basses, leads and plucks, and it scales to full mixes with ease. Ships for Windows in VST, AU, AAX and loads in every popular DAW.
OPx-4 System Requirements
| Operating system | Windows 10 / 11 (64-bit) |
| Formats | VST, AU, AAX |
| CPU | Intel / AMD, SSE2 support |
| RAM | 4 GB minimum (8 GB recommended) |
| Disk space | ~1 GB free |
How to install OPx-4 on Windows
- Click the green Download button above to get the Windows installer.
- Run the installer and choose your plugin format (VST, AU, AAX).
- Open your DAW, rescan plugins, and load OPx-4 on a track.
OPx-4 FAQ
What is OPx-4?
OPx-4 is a Synth plugin by AIR Music Technology. OPx-4 is the synth you reach for when you need fat, expressive patches.
Does OPx-4 work on Windows?
Yes. OPx-4 runs on Windows (Windows 10 and 11, 64-bit) and is available as VST, AU, AAX.
What plugin formats does OPx-4 support?
OPx-4 is available in the following formats: VST, AU, AAX. It works in all major DAWs that host these formats.
How do I download OPx-4?
Click the green Download button on this page to get OPx-4 for Windows, then run the installer and rescan plugins in your DAW.
User Reviews
Sounds fantastic. Interface could be a touch bigger.
Does exactly what it promises. My go-to for synth.
Really solid. Wish it shipped with a few more presets.
Sounds fantastic. Interface could be a touch bigger.
