See your sound.

Professional real-time audio analysis for macOS. Built for sound engineers who need speed, clarity, and precision.

Download on the Mac App Store

Requires macOS 14.0 or later

Spectrix showing real-time audio spectrum analysis with RTA and spectrogram views

Everything you need to ring out a room.

Spectrix gives you the same analysis tools used in world-class live sound — in a native macOS app that feels like Apple built it.

Real-Time Analyser

High-resolution RTA with 4096-point FFT at 48kHz. Logarithmic frequency scale from 20Hz to 20kHz with sub-bin accuracy via parabolic interpolation.

Spectrogram

Scrolling time-frequency heatmap reveals feedback and resonances as persistent bright lines. Thermal colour ramp makes problem frequencies unmissable.

Transfer Function

Dual-channel H1 estimator with magnitude, phase, and coherence display. Measure your system response with confidence.

Peak Identification

Automatic detection and labelling of spectral peaks with precise frequency readout. Find feedback frequencies at a glance — with optional musical note display.

Snapshot Compare

Freeze the current spectrum as a reference trace and compare against live audio. See exactly what changed after your EQ adjustments.

Pink Noise Generator

Built-in pink noise source with adjustable level. No external gear needed — excite the room directly from your Mac for quick system checks.

Precision tools, zero bloat.

Spectrix is a focused, native macOS app with no Electron, no subscriptions, and no internet connection required. It launches instantly and uses minimal system resources.

  • Smoothing control 1/1 to 1/48 octave fractional smoothing
  • Temporal averaging Exponential moving average with adjustable weighting
  • Peak hold Track maximum levels with smooth decay — double-click to reset
  • Adjustable gain and floor Fine-tune sensitivity to match your signal level
  • Keyboard-driven workflow Every feature has a shortcut — Space, P, R, S, A, T, F, C, N
  • Sub-bin frequency accuracy Parabolic interpolation for precise readings between FFT bins

System Requirements

  • macOS 14.0 Sonoma or later
  • Apple Silicon or Intel Mac
  • Audio input device (built-in or external)
  • Microphone permission required

Technical Specifications

  • 4096-point FFT (11.72Hz bin resolution)
  • 48kHz sample rate
  • 20Hz – 20kHz logarithmic frequency scale
  • 60fps rendering via Metal-backed Canvas
  • Native SwiftUI — no Electron
  • Apple Accelerate framework (vDSP)

Available on the Mac App Store.

One-time purchase. No subscriptions. No account required.

Download on the Mac App Store