Available on the App Store

RTA Audio Spectrum Analyzer

Transform your device into a professional-grade acoustic measurement instrument. Whether you're a sound engineer tuning a venue, an acoustician measuring noise levels, or an audio enthusiast optimizing your home theater, this app delivers the precision and features you need.

iOS
iPadOS
macOS
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RTA Audio Spectrum Analyzer 1
RTA Audio Spectrum Analyzer 2

Professional-Grade Analysis

Built with ANSI S1.11 and IEC 61260 Class 1 compliant filters, RTA provides measurement accuracy that meets international standards.

Real-Time Spectrum Visualization

Watch audio frequencies come alive with smooth, responsive spectrum displays. Switch between classic bar graphs and continuous line plots.

Noise Curve Overlays

Compare against NC, NCB, PNC, RC, NR, and X-Curve standards. Essential for HVAC noise assessment and venue certification.

Flexible Decay & Averaging

Select from Fast (35ms), Medium (125ms), Slow (500ms), and Very Slow (1s) decay times. Choose real-time, peak hold, or running average modes.

Device Calibration

Built-in calibration profiles for popular iOS devices. Import custom calibration files for external measurement microphones.

Save & Export

Capture snapshots with GPS location tagging and custom notes. Export to CSV, JSON, and PDF for professional reports.

App Preview

See RTA in Action

Experience the power of professional audio analysis with an intuitive, beautifully designed interface optimized for real-world use.

RTA Audio Spectrum Analyzer Screenshot 1
RTA Audio Spectrum Analyzer Screenshot 2
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Key Features

Real-time octave and 1/3 octave band analysis
ANSI/IEC Class 1 compliant digital filters
Overall SPL with A-weighting
Peak and minimum level tracking with double-tap reset
Six noise curve overlay standards
Four selectable decay time constants
Three averaging modes
Bar and line visualization options
Built-in device calibration profiles
Custom calibration file import
GPS location tagging for measurements
Export to CSV, PDF, and JSON formats
Dark theme optimized for low-light environments
Portrait and landscape orientation support
No advertisements or subscriptions

Ideal For

Live sound engineers and FOH technicians
Acoustic consultants and noise assessors
HVAC and building services engineers
Recording studio technicians
Home theater enthusiasts
Audio system installers
Musicians and audio hobbyists
Environmental noise monitoring
Educational demonstrations

Measurement Accuracy

All octave and 1/3 octave band filters meet or exceed ANSI S1.11 and IEC 61260 Class 1 specifications for center frequency accuracy and filter bandwidth. The app uses optimized FFT algorithms for low-latency, high-resolution frequency analysis.

Privacy Focused

RTA processes all audio locally on your device. No audio data is transmitted to external servers. Location data is only captured when you explicitly save a measurement and can be disabled in system settings.

Experience Professional Acoustic Measurement

Download RTA Audio Spectrum Analyzer today and experience professional acoustic measurement in the palm of your hand.

Download Now