Website plays https://fixmyspeakers.com/static/tone.mp3 https://fixmyspeakers.com/static/tone.mp3 Spectrogram shows high energy at many frequencies. Waveform s

Website plays https://fixmyspeakers.com/static/tone.mp3 https://fixmyspeakers.com/static/tone.mp3 Spectrogram shows high energy at many frequencies. Waveform shows saturated curve, no surprise. Might have been just recorded from some analog circuit.