Here are a couple screenshots of some proof of concept GUI's I threw together using a webcam, the PC soundcard input with an FFT display of the metal detector audio output. Note the On-Screen Display time and date stamp on the webcam video stream (Put there by Flowstone BTW), and the waterfall display of the audio Formants in the upper right of the 3rd picture. Both the timestamped video and the waterfall display can be saved to disk from the GUI.
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