Fill your mbira sensor with your sample, place your phone on a table, and orient your mbira sensor near the microphone. Visit mbira.groverlab.org
and tap Choose File
Under Select an action, tap Voice Recorder.
The Voice Recorder app will launch. Tap the red Record button and begin pinging your mbira sensor.
After recording several pings, tap the Stop button.
Tap Analyze Sound File. This step can take several seconds to complete. If it takes too long, tap the Advanced Settings dropdown and decrease the Maximum number of pings to analyze.
After a few seconds, the website will report the number of pings it found in the file, the average frequency of these pings, the standard deviation and coefficient of variation of these pings, and plots of the waveform of each ping.