Internet Co. F-REX — Free Download
F-REX is a real-time audio analysis and remixing tool that splits sound into gain, frequency, and panning. It lets you isolate and control specific sonic regions, apply effects, and adjust volumes independently.

Real-Time Audio Analysis and Visualization
F-REX continuously analyzes incoming audio and breaks it into three parameters: gain, frequency, and panning. These are displayed graphically, giving you a live visual map of the sound. You can then focus on a specific part of the spectrum and independently manage the inside and outside areas of that focus.
This granular control allows you to isolate particular sounds within a mix, such as a vocal line, and adjust its volume or apply effects without affecting the rest. The visualization updates in real time, making it easy to see exactly how your adjustments shape the audio.
Independent Control of Inside and Outside Regions
The core workflow centers on selecting a target region defined by frequency and panning. F-REX lets you treat the inside and outside of this region as separate entities. You can adjust volume and panning for each side independently, and apply effects like compressor and reverb differently.
For example, you could lower the volume of a specific instrument inside that region while boosting the overall ambience outside it. This feature is useful for creating unique remixes by surgically altering elements without disrupting the rest of the mix.
Practical Sound Isolation and Learning Tool
A key practical use is isolating a particular sound in a song, like a vocal or a bassline, and reducing its volume to hear other parts more clearly. This acts as a noise-canceling tool that helps you focus on specific instruments, which is great for learning songs by ear.
You can also boost certain instruments to make them more audible in the mix. This makes F-REX valuable for musicians and producers who want to deconstruct tracks, practice parts, or simply understand the arrangement better. The real-time nature means you can make adjustments while the music plays.
Host Integration and System Considerations
F-REX is not a standalone application; it requires a VST or AU host. It operates as a plugin within your existing digital audio workstation. The provided system requirements list specific macOS and Windows versions, suggesting you should verify compatibility with your host and OS before use.
When planning your setup, ensure your computer meets the stated processor and memory requirements to handle real-time analysis smoothly. The user interface needs a minimum screen resolution. Given the varying host applications, checking that F-REX runs properly in your specific environment is advisable.
Key features
- Real-time analysis of gain, frequency, and panning
- Graphical visualization of audio parameters
- Independent volume and panning control for inside and outside focus areas
- Built-in compressor and reverb effects per region
- Sound isolation for noise canceling and learning songs
- Requires VST 2.4 or AU compatible host application
Best for
Best for musicians, producers, and audio enthusiasts who want to deconstruct mixes, isolate specific instruments for practice or remixing, and create unique sonic variations by manipulating frequency and panning regions in real time. It is especially useful for learning songs by ear and for creative sound design.