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DownUnderCTF 2020: On the spectrum

DownUnderCTF 2020: On the spectrum

On the spectrum

100 points

My friend has been sending me lots of WAV files, I think he is trying to communicate with me, what is the message he sent?

Author: scsc

Attached files:

  • message_1.wav (sha256: 069dacbd6d6d5ed9c0228a6f94bbbec4086bcf70a4eb7a150f3be0e09862b5ed)


I've used Sonic Visualizer to open the provided file. With some alignments I've managed to visualize the flag hidden in the spectrum.