> For the complete documentation index, see [llms.txt](https://ravins-organization.gitbook.io/ctf-writeups/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ravins-organization.gitbook.io/ctf-writeups/2022/sst-inc-rte-2022/audio-tester.md).

# Audio Tester

Desc: I seem to have intercepted this message from FURRY HQ. The ISA needs your help to decode this for us.\
[File](https://user-images.githubusercontent.com/77960307/206889736-9876c593-0c48-4a35-88d1-86dcda7bf3ec.mp4)

Well, this wav file is actually Robot36 SSTV Encoded. Basically, slow scan television images. Download a Robot36 SSTV Decoder and let it listen to the file.

You should get something like this.

[![image](https://user-images.githubusercontent.com/77960307/206890204-7c1b7c80-09e4-4d7e-8c12-c745260df25c.png)](https://user-images.githubusercontent.com/77960307/206890204-7c1b7c80-09e4-4d7e-8c12-c745260df25c.png)

The challenge FLAG: `YBN{Cnegative!}`