Blue Cat's FreqAnalyst Multi: Multi-Track Spectrum Analyzer by Blue Cat Audio Free Download

The core feature is a real-time spectrum view that can show mono, stereo or mid/side signals from several tracks at once. Each track can use its own analysis settings through the advanced routing, so every signal is measured in the way that suits it.

For each curve you can choose instant, peak or average display, and set custom absolute and relative thresholds. Slope and offset correction give you control over how the analysis is shown. A smart interpolation algorithm keeps the display smooth, and note information appears in the spectrum view to help link peaks to pitches.

Named curves and the Diff view make it easier to compare spectra, whether you are matching the EQ of one sound to another or measuring a response curve.

Curves can be named and saved, so you can A/B compare them later or share a specific view with a collaborator. The interface offers multiple display sizes, zoom, opacity control and layout customization. The developer also notes that a custom interface can be built with its skinning language.

For session use, the plugin includes undo and redo, an integrated presets manager, and copy and paste of plugin state between instances through the system clipboard. Full MIDI control and automation support, with MIDI Learn and zipper-free parameter updates, are included.

The plugin uses native DSP code and, when fed silence, shuts its processing down to reduce CPU load. Smooth bypass switches it on and off without noise. Blue Cat Audio also notes multi-core processor support through its data sharing technology.