FreqAnalyst Multi — Free Download
FreqAnalyst Multi is a real-time spectrum analyzer that displays multiple audio tracks on one graph, ideal for mixing, EQ matching, and frequency overlap detection.

Purpose and Core Function
FreqAnalyst Multi is a real-time spectrum analyzer designed for visualizing the spectral content of multiple audio tracks simultaneously on a single screen. Its primary purpose is to support mixing workflows by acting as a frequency overlap detector, allowing you to see exactly which part of the spectrum each instrument occupies. This helps in making informed EQ decisions to reduce muddiness or harshness.
The plugin also facilitates comparison tasks like EQ matching and response curve measurement. A dedicated Diff view computes the difference between curves, making it easy to align the frequency response of one track to another. This is useful for matching tones across different takes or hardware units. The analysis can be fine-tuned per channel, with modes for instant, peak, or average response.
Key Capabilities for Analysis and Comparison
The plugin provides fine control over analysis parameters, including slope and offset correction. Its smart interpolation algorithm ensures smooth display, even with high resolution in both time and frequency domains. Each track’s spectrum can be zoomed and precisely measured, with note information displayed for musical reference. Memory slots allow you to store curves for easy A/B comparison between different setups or project sections.
For multi-track work, you can assign a custom name to each curve, which helps in keeping track of sources when sharing or reviewing. The Diff view is particularly useful for EQ matching, as it shows the exact difference between two spectra. This feature also aids in response curve measurement of hardware or virtual gear, allowing you to see frequency deviations clearly.
Workflow and User Interface Flexibility
FreqAnalyst Multi is built for flexible routing: you can define different analysis settings for each track, adapting the visualization to the specific characteristics of each signal. This is beneficial when comparing signals with varying levels or frequency content. The user interface supports opacity management and advanced layout customization, letting you adjust the window to your personal preferences and integrate it into your existing setup.
For those who want extreme customization, the plugin supports a custom user interface via Blue Cat’s skinning language. This allows you to design a fully bespoke look or adapt the layout for specific tasks. The plugin also includes a smooth bypass function that activates or deactivates without noise, ensuring no audio artifacts during mixing or A/B comparisons.
Practical Applications and Integration
In a mixing context, FreqAnalyst Multi helps you identify frequency collisions between instruments, such as a bass guitar and kick drum, so you can carve out space for each. For mastering, it aids in checking the overall spectral balance across multiple tracks or versions.
The plugin supports automation and MIDI output, allowing you to record output parameters as automation curves or send MIDI CC messages to other plugins for sidechain effects. This opens up creative possibilities, like using the analyzer’s readings to drive other parameters. With full automation support, you can recall precise settings within your project, and its multi-core support ensures efficient performance.
Key features
- Real-time multi-track spectrum analyzer for mono, stereo, or mid/side signals.
- Diff view computes spectral differences for EQ matching and response measurement.
- Display of instant, peak, or average response curves for each track.
- Fine-tunable analysis parameters with slope, offset, and interpolation controls.
- Zoomable spectrum view with precise measurement and note display.
- Memory slots for saving and comparing curves, with naming and A/B capability.
- Customizable UI with opacity, layout options, and full skinning language support.
Best for
Mixing engineers and producers who need to visually compare frequency content across multiple tracks, identify overlaps, match EQ curves, or measure response differences with high precision.