Grasshopper 1
Computer Science
Level
4
There is a message encrypted in this image.
What is the answer to this question?
Hint 1: The answer is 8 digits.
Hint 2: "Can you hear all our voices?"
The answer is 59820385.
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1 solution
The image looks like the spectrogram of somebody speaking. This can be guessed from how the image looks like a spectrogram and how there are strips across the spectrogram, which is characteristic of voice due to standing waves formed in the throat when a person talks. It is hence our interest to decrypt what the person is saying.
A quick research might lead to a program called Coagula that reads a picture like a spectrogram and outputs the audio. An estimation of the range of a human voice will aid in setting the maximum and minimum frequency.
A little trial and error would recover this audio file , from which can be deciphered to be saying: "tinyurl.com/917213"
Going to that URL would take you to another audio file . Notice that this audio has 8 bursts of sound, which is the number of digits the answer has. This hints that the file's spectrogram would give the answer to this question.
A quick research might lead to another program called Sonic Visualiser , which can generate a spectrogram for an audio file. Parsing the above audio file into this program outputs: