Signal Path 4+

Record and view spectrums

Toomas Vahter

    • $8.99


Signal Path is the most performant spectrum viewing app with beautiful user interface. You can record audio spectrums using microphone and replay them or open large recordings containing I/Q data.

Inspect spectrums
Spectrums can be selected using two finger drag gesture. Tapping on histogram reveals amplitude value of the selected frequency bin.

Adjust thresholds
Signal Path automatically expands amplitude threshold range when viewing spectrums. You can also set custom amplitude thresholds if needed.

Keeping file size under control
Signal Path can set a maximum file size for recording after which file is recreated.

Can open wav files and save recorded audio as wav

Supported interleaved raw I/Q data formats
Float, int8, int16, int32, uInt8, uInt16, and uInt32

Fast Fourier transform lengths
256, 512, 1024, 2048, 4096, 8192

Window functions
Rectangular, Blackman, Hamming, and Hann

What’s New

Version 2.7

Performance and compatibility improvements

Ratings and Reviews

syedhali ,

Crashes when creating a new audio recording

Really promising app, unfortunately it crashes when you try to create a new audio recording from the menu. A fix would be greatly appreciated for a $9 app!

Developer Response ,

Thank you for reporting it and I am sorry for encountering this. This issue is fixed in version 1.5.

FL_Tech ,

Can’t open pre-recorded files

Wasn’t clear from the description (since it said "import from any source") but the app won’t import a pre-recorded file. There is no help file, nor documentation. Tried .wav, mp3, and m4p without luck.

Developer Response ,

It does support wav files in recent versions. The description was not as clear as it should have been.

jacykane ,

Bull crap

Nothing but a file folder ap doesn’t work at all should get my money back do not buy

Developer Response ,

Signal Path is a file based app for recording and reading data from files. New recordings can be created by tapping on the + button in the file selection/creation view.

App Privacy

The developer, Toomas Vahter, 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

    Up to six family members can use this app with Family Sharing enabled.

More By This Developer

You Might Also Like