Signal Path is the most performant spectrum viewing app with beautiful user interface. You can record audio spectrums using microphone or open large recordings containing I/Q data.
Spectrums can be selected using two finger drag gesture. Tapping on histogram reveals amplitude value of the selected frequency bin.
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.
Supported interleaved I/Q data formats
Float, int8, int16, int32, uInt8, uInt16, and uInt32
Fast Fourier transform lengths
256, 512, 1024, 2048, 4096, 8192, 16384
Rectangular, Blackman, Hamming, and Hann
* Redesigned from ground up
* Additional Fourier transform length: 16384
Ratings and ReviewsSee All
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.
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.
With Family Sharing set up, up to six family members can use this app.