N-Signal / FFT Sound Analyzer
Audio Spectrum Analyzer
Free · Designed for iPad. Not verified for macOS.
Visualize your sound in real time — from stage to studio.
Measure sound pressure and digital frequency with N-Signal.
N-Signal helps you visualize sound in real time.
It measures sound pressure (dBSPL) and analyzes digital frequency levels (dBFS) with precision.
Helpful for adjusting PA systems, testing stage sound, or improving room acoustics — whether in studios, churches, or classrooms.
* Key Features
- Real-time audio spectrum with FFT analysis
- dB SPL sound pressure level meter (mic input)
- Digital frequency analyzer (dBFS scale)
- Smooth graph motion optimized for live performance
- Supports dark modes
- Designed for musicians, engineers, and sound enthusiasts
N-Signal isn’t a laboratory-grade instrument, but a reliable audio reference tool for daily sound checks and education.
What's New in v1.1.0
Real-time Peak Frequency Display
- See the dominant frequency at a glance with a live marker on the spectrum graph
- Smart peak tracking prevents label flickering in noisy environments
- Frequency shown with "≈" symbol to indicate approximation
Improved Low-Frequency Accuracy
- Enhanced FFT processing now measures down to 20Hz (previously 23Hz)
- More accurate energy distribution across frequency bands
Visual Refinements
- Cleaner spectrum display with uniform floor level
- Smoother curves in the low-frequency range
The developer, kyu il jung, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- kyu il jung
- Size
- 33.9 MB
- Category
- Utilities
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
English and 19 more
- English, Arabic, Croatian, French, German, Hindi, Indonesian, Italian, Japanese, Korean, Malay, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Thai, Turkish, Ukrainian, Vietnamese
- Age Rating
9+
- 9+
- Contains
Advertising
- Copyright
- © 2026 JCMEEK