Reflex Spectrum Analyzer

Reflex Spectrum Analyzer | Audio Plugins for Free

The Reflex Spectrum Analyzer offers the expected standard features for plugins in its category, including stereo comparison and the ability to tilt and smooth the display.

What sets this plugin apart is its exceptional capability to display responsive and detailed bass information. Technically, it employs four 512-element FFT analyses in a multiband configuration with distinct sample rates, optimizing the distribution of the resulting 1,024 frequency bins across the audible range. This design achieves a low-end bin spacing of just 0.7Hz, equivalent to that of a single 65,536-element FFT.

The combined frequency amplitude spectrum is presented on a semitone log scale, covering 11 octaves from 10Hz to 20kHz. Although information theory limits high-resolution viewing of low-frequency data in both the time and frequency domains simultaneously, Reflex brings you closer to the ideal.


– 132 log-spaced frequency bands with semitone spacing from 10Hz to 20kHz.
– 90dB range.
– Adjustable smoothing across frequency and time.
– Left-Right and Mid-Side stereo modes.
– Short-term (3-second) LUFS display.
– Adjustable spectrum tilt (0, 3dB, or 4.5dB per octave).
– Peak frequencies displayed on a chromatic scale (calculated without tilt).
– Adjustable GUI size (S, M & L buttons).
– Click/drag over the spectrum display to audition specific frequencies (vertical position controls filter width).
– Sidechain input for comparing spectra (if using the AU format, also click “Sidechain Compare”).

Technical notes:

– Available in VST3 format for PC, and VST3 & AU formats for Mac. AAX support coming soon.
– Requires a compatible Digital Audio Workstation or other plugin host.
– Supports common sample rates from 44.1 to 384kHz.

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