testing/signal-estimator: new aport
signal-estimator is a small command-line and GUI tool allowing to measure different characteristics of the signal looped back from audio output to audio input.
Features:
- send test signal to output device and receive looped back signal from input device
- measure signal latency (the shift between output and input signal)
- measure signal loss ratio (number of glitches per second in the input signal)
- measurements output in JSON format for easy parsing
- dump output and input streams to text files and plot them using matplotlib