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ummm...i need some hints wth this challenge...i don't know what should i do.., ,i just found visual crypto, but the picture in this challenge have many color and only one picture, what should i do? ,am i on the right track?

you should do what the name of the challenge says

..i've tried with audacity and import data raw...but i only hear noise..

I'm also trying this at the moment. Mono, Stereo, Endians, codecs ... it seems as if I simply don't know enough about audio files to solve this challenge.

Btw. GSM 6.10 sounds funny

Virus solved this one after a long struggle...

if you hear morse code like it happened to us saying something like EAT TOMATO, you are way off! you really need to find a voice as stated in the other thread on this challenge, which has also better hints imho.

btw: there are cool challenges after this one, which open only if you get this one done!

Man, this challenge is frustrating me. I have tried dozens of conversions and sample rates, among those: 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, and 16 Kilohertz, and also 1024, 2048, 3076, 4096, 8192.

Depending on what sample rate I use, I get very different results, but it's still all mostly noise/gibberish. Sometimes different sounds, but no voice.

Is there actually any indication on what parameters are the right ones to use? Or do we have to blindly try out anything until we arrive at the solution by chance?

ciao AMFV,

i hope i do not spoil too much, but i understand your frustration as it was mine just some days ago. i could not solve the challenge with Audacity...

First you need to get rid of the data which encapsulates what you want to listen. Think also that the encapsulated data needs some extraction as its binary has stuff like filtering lines, which is not part of the song.

Then you need to try out some formats/software and see if you can play it... (the other thread mentions some good software!)...

I wrote a little C program to remove certain bytes from the original PNG file. The file size that I arrive at before further processing is 18306 bytes. That correct?

No, the number of bytes should be a multiple of the pixel in the image. additionally, there is one channel which does not hold any information...

dangermouse wrote:
btw: there are cool challenges after this one, which open only if you get this one done!

Actually it have allowed only two challenges which were not opened from other branches.

Hippo wrote:

dangermouse wrote:
btw: there are cool challenges after this one, which open only if you get this one done!

Actually it have allowed only two challenges which were not opened from other branches.

According to this graph: http://tron.yamagi.org/zeug/map.svg

it is even only one challenge (Make Money Fast).