SignalScope X 4+

Dynamic Signal Analysis Tools

Faber Acoustical, LLC

    • 3.5 • 11 Ratings
    • Free
    • Offers In-App Purchases


SignalScope X offers a range of powerful measurement and analysis tools to enhance your productivity in areas such as acoustics (sound and vibration), audio, electronics, and electroacoustics.

SignalScope X includes a free oscilloscope tool. SignalScope X makes additional tools available via 3 tiers of subscription-based tool sets to meet your basic, advanced, and professional needs. Each subscription works on your iPhone, iPad, and Mac.

- Analyze signals coming from the Mac or iOS device’s current audio input device.
- Assign engineering units to your input signals and calibrate external transducers for accurate measurements.
- Assign input channel units and sensitivities for individual USB Audio devices.
- Connect lab-grade microphones and sensors to your Mac, iPad, or iPhone with suitable interface hardware for precise measurements.
- SignalScope offers enhanced support for select hardware from Digiducer, The Modal Shop, and miniDSP.
- Nominal acoustic sensitivities included for iPhone and iPad built-in microphones, voltage sensitivities for headset input (including the standard Lightning-to-headset adapter).
- Manually switch between available audio input and output sources.
- Load microphone frequency response data (FRD) and apply frequency response correction (FRC) to FFT-based measurements.
- Manually adjust audio sample rates, even up to 768 kHz, depending on hardware.
- Save acquired measurement data to CSV, TXT (tab-delimited), or MAT files.
- Save high-resolution analyzer display images to PDF files.
- Retrieve your data files from your device via Files (iCloud Drive), iTunes File Sharing, or through a web browser on another device. Files may also be opened in other compatible apps (e.g. Mail, Notes, Numbers, Dropbox, etc).

Basic Tools:
- Oscilloscope
- FFT Analyzer - Spectrum analyzer with user-settable frequency limits and signal triggering
- 2D Real-time Spectrogram Analyzer
- XY Plotter - Create Lissajous curves or visualize your stereo mix
- Stereo Signal Generator

Advanced Tools: (Advanced Tool Set also includes basic tools)
- 3D Real-time Spectrogram Analyzer - Stunning live visualization of incoming data
- Octave-band Analyzer - Whole and 1/3-octave RTA
- Level Meter - Overall signal level meter
- Max Levels
- Noise Dosimeter
- Data Recorder - Stream up to 8 channels to WAV, AIF, or CAF audio files
- Multi-channel Audio File Player - Analyze pre-recorded data

Pro Tools: (Pro Tool Set subscription includes basic and advanced tools)
- Dual-channel System Analyzer (Dual FFT analysis with support for Frequency Response Magnitude/Phase, Phase Delay, Group Delay, Coherence, Impulse Response and Cross-Correlation)
- Sound Intensity Analyzer - With a suitable p-p probe, measure sound intensity and acoustic particle velocity spectra (narrowband FFT and whole or 1/3-octave bands) and time waveforms.
- Room Acoustics Analyzer (T20, T30, T60, nonlinearity, EDT, Early Decay Time, Center Time, Clarity, and Definition in various frequency bands, adjustable Schroeder integration limits)
- MultiTool - Powerful data monitoring and project management (Add 2-6 subtools, depending on screen size, and save configurations for easy recall at a later time.)
- Polar Plot - Generate beautiful high-resolution plots of polar data loaded from properly formatted data in a text or csv file.

Additional Pro Features:
- User-defined custom metadata in saved audio and data files
- Data logging support in the Level Meter, Octave Analyzer, and Noise Dosimeter
- Percentile exceeded sound levels in the Level Meter and Octave Analyzer
- NC, RNC, and NR references curves, NC, SIL, and NR values in the Octave Analyzer
- Voltage decibel levels can be displayed in dBV or dBu

Subscription Terms:
Privacy Policy:
Terms and Conditions for

What’s New

Version 12.1

- The Spectrogram now supports user-selected min and max frequencies.
- The Spectrogram now supports graphing with time on the vertical axis (consistent with a typical LOFARgram).
- The Spectrogram includes an Auto Stop function for stopping after a user-defined period of time.
- When exporting Spectrogram data to a file, the magnitude data will be stored as decibel values when the dB scale is selected for magnitude values in the display settings.
- Support added for the latest Digiducer USB Digital Accelerometer models.
- Other cosmetic and minor improvements.

Ratings and Reviews

3.5 out of 5
11 Ratings

11 Ratings

drcola12345 ,

Not free

fft requires a subscription. Are you kidding me?

EDIT : I don't have a problem with paying for a good product, but not even letting you do an fft renders the free portion of the tool practically useless. The app can be downloaded for free, but it actually requires a subscription. No thanks.

Developer Response ,

Hi drcola12345,
You can certainly find other FFT analyzers for cheap or free. The FFT Analyzer tool in SignalScope X offers more than you might find elsewhere for a comparable price, including multi-channel analysis (up to 16 channels, simultaneously, in real time), audio sample rates up to 768 kHz (with suitable hardware), a precise data cursor, data export (to MAT or CSV files), high resolution PDF graph generation, real-time data overlay over previously captured data, and many other configuration options. It's designed for lab-grade measurements. Charging a fee for the hard work invested in making a top-tier audio spectrum analyzer is how we stay in business. Thank you for your consideration.

Akos95126 ,

Captured (saw) hum in vehicle when others didn't.

I had a low amplitude hum in my motor vehicle after a crash and repair. It was irritating me but two other spectrum analyzer/FFT apps didn't "see" it, probably because of road rumble noise that was almost as loud, overwhelming the measurement. This SignalScope X app did see it, which I showed the mechanic. I recommend it.

owen fitzgerald period 8 ,

Bad app

Horrible app, had to download for school and it had a whole complicated lab that was very annoying to do


Basic Tool Set, 1 Month
SignalScope X Basic Tools
Free Trial
Advanced Tool Set, 1 Month
SignalScope X Advanced Tools
Free Trial
Pro Tool Set, 1 Month
SignalScope X Professional Tools
Free Trial

App Privacy

The developer, Faber Acoustical, LLC, 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 Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Identifiers
  • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Some in‑app purchases, including subscriptions, may be shareable with your family group when Family Sharing is enabled.

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