Touch-Tone dialing

35 points

And now for something old-school cool...

You'll need to download a small .wav file with a DTMF-encoded sequence inside. Play it back, you'll hear it. The task is simple: decode the sequence and send it back as the solution.

The sequence only uses the 0-9 digits as well as * and #.

Good luck!

Getting the problem set

GET /challenges/touch_tone_dialing/problem?access_token=...

Problem JSON will contain only one key:

• wav_url: the one-time URL for the .wav file containing the encoded DTMF sequence

Submitting a solution

POST /challenges/touch_tone_dialing/solve?access_token=...

Solution JSON structure:

• sequence: the decoded DTMF sequence, as a string - e.g. "*767#111239*55"

Why this challenge?

Because you needed a reason to go rewatch this cheesy masterpiece. You're welcome!