Audio engineer – SignalSpy - Audio Oscilloscope, Frequency Spectrum Analyzer, and more Review

It's a shame this app is for sale. The spectrograph returns data that is off by a factor of 10. Play it a 440hz "A" and it reads out a bold line around 40hz. I can't read the exact measurement because the scale is useless. The RTA section is filled with noise, it looks like the FFT was not windowed at all, and the scale is linear. Annoying and useless. The oscilloscope seems cool, but there are not enough user controls to make it anything more than a fun waveform display. Complete waste. Please make the tweaks and give the users what they paid for.
Review by Chrisfromthepast on SignalSpy - Audio Oscilloscope, Frequency Spectrum Analyzer, and more.