SignalScope X 4+

Dynamic Signal Analysis Tools

Faber Acoustical, LLC

    • 3.7 • 12 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 12.5

- Improved handling of data and audio files.
- Significant improvements have been made 'under the hood' to ensure that the app runs well on the newest operating systems.
- Another normalization option has been added to the Polar plot. Polar data can now be normalized with respect to the maximum value, rather than the value at 0 degrees.
- Other minor cosmetic and stability improvements.

Ratings and Reviews

3.7 out of 5
12 Ratings

12 Ratings

Dave Tenney ,

SignalScope the Best by Far

SignalScope is the best sound and vibration analyzer app for iPhones and MacBooks, by far, available for professional testing and analysis.

There are many apps out there that claim to be sound level meters and octave analyzers. They do not have calibrated and verified mesurement capabilities. You can trust the results from SignalScope. You cannot from many other apps.

Also, those who complain that SignalScope costs money do not understand the technical issues of making good quality measurements. It takes much engineering knowledge and skill to develop and support an application like SignalScope.

I am not a fan of cliches, but it is true, you get what your pay for.

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.

Jf4828 ,

Better than expected

I’m a long time user of AudioTools and Smaart. So far this application looks good, is responsive and less buggy than others. I know it’s expensive and subscription based but the other tools are quite expensive as there is not a large user base. SPL calibration worked flawlessly. For live sound I love that I can simultaneously monitor RTA, spectroscope, dB at multiple weightings and sound exposure etc. I’ve also tuned with dual channel measurement and worked flawlessly(although I slightly prefer Smaart for this one thing…). Only thing I haven’t sorted is how to change scale of Y axis to custom ranges I’m interested in…. The fact that this works with single subscription on my phone, iPad and Mac really deals the deal for me.


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

More By This Developer

SoundMeter X
SignalScope Basic 2020
SoundMeter Pro 2020
SignalScope Basic 2022
SignalScope Advanced 2020
SignalScope Pro 2020

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