The beginnings of a great app – SignalSpy - Audio Oscilloscope, Frequency Spectrum Analyzer, and more Review

Useful app to take a closer look at a sound. I really like the spectrogram mode where you can see the evolution of peaks in the spectrum over time. Unfortunately the frequency scale is completely wrong - just feed it a pure sine wave of known frequency, and the peak appears at the wrong frequency (about 10x too low) Two years after I first reviewed this there is still lots of missing functionality: on screen stop/start, screen capture (without "screen shot"), ability to zoom / change scales, ability to add a cursor to read detailed information. Right now this is no more than a toy app, OK for exploring the sounds around you but no scientific instrument...
Review by FlorisHJ on SignalSpy - Audio Oscilloscope, Frequency Spectrum Analyzer, and more.