The challenge text reads:A raging Real Wild Child!
Flag is the STRING you end up with after solving challenge, case insensitive.
With an attached ```rage.wav``` file.
When playing the audio we hear a distinct rythmic beeping in the background.A quick frequency analysis with [audacity](https://en.wikipedia.org/wiki/Audacity_(audio_editor)) shows us, that the beeping noise centers around the 500Hz range on the Frequency spectrum:
![](https://md.chaotikum.org/uploads/upload_2697095f6a2edb2efa61a38b7a5a79f2.png)
After applying a frequency filter, which blocks everything except the 500Hz signals the morse code becomes the dominant element in the sound file.
![](https://md.chaotikum.org/uploads/upload_d9eb4296d8b909d91f609b652c945c2e.png)
We export the 'clean' sound file as ```reage_morse.wav```.Trying to decode the morse code by hand was too slow and tedious and was errorprone due to lack of training:```Morse code:R: .-.A: .-G: --.E: .R: .-.G: --.T: -O: ---W: .--E: .I: ..R: .-.D: -...-....-.....-..---```But there is an app for that:https://morsecode.world/international/decoder/audio-decoder-adaptive.html![](https://md.chaotikum.org/uploads/upload_58ddb91e968a92ae9b4c9786d1f453a1.png)With a bit of manual tweaking the clear decoded message is displayed and can be entered as a flag.