Countdown to PDC2008: Secrets Revealed
- Posted: Sep 04, 2008 at 11:12 AM
- 63,759 Views
- 32 Comments
Download
How do I download the videos?
- To download, right click the file type you would like and pick “Save target as…” or “Save link as…”
Why should I download videos from Channel9?
- It's an easy way to save the videos you like locally.
- You can save the videos in order to watch them offline.
- If all you want is to hear the audio, you can download the MP3!
Which version should I choose?
- If you want to view the video on your PC, Xbox or Media Center, download the High Quality WMV file (this is the highest quality version we have available).
- If you'd like a lower bitrate version, to reduce the download time or cost, then choose the Medium Quality WMV file.
- If you have a Zune, WP7, iPhone, iPad, or iPod device, choose the low or medium MP4 file.
- If you just want to hear the audio of the video, choose the MP3 file.
Right click “Save as…”
- High Quality WMV (PC, Xbox, MCE)
- MP3 (Audio only)
- MP4 (iPod, Zune HD)
- Mid Quality WMV (Lo-band, Mobile)
- WMV (WMV Video)
Surface, SharePoint, Live Platform, Identity, Mesh, SQL Server 2008, Exchange, Ad Platform, Office Communication Server, Windows 7, Open XML, Silverlight, ASP.NET, Oslo, Virtualization, XNA and so much more content we can hardly keep our hard hats on! Why haven’t you registered for the PDC yet?! Plus Mike issues a new Hard Hat Challenge – will the winner this week be 9 years old? And, if you’re really curious about capturing the brainpower . . . check this out!
Comments Closed
Comments have been closed since this content was published more than 30 days ago, but if you'd like to continue the conversation,
please create a new thread in our Forums,
or
Contact Us and let us know.
Follow the Discussion
Here's a link to the audio file for this week's Hard Hat Challenge.
"Thank you for calling new farms where nothing is left to chance. When ordering samples from our entire collection, be sure to start with the correct seed. Only a perfect number will guarantee your satisfaction. We appreciate your patents. One of our representatives will be with you shortly. "
hmm, interesting
"sample" and wave files... and "order" with "entire collection"
implies data might be held at perfect number offsets in the data chunk?
All I'll say is that it's great to see you guys sharing ideas on the forum, and I love the thinking that's going on.
Keep on posting,
C
and will we get te same type of network access as per PDC05.
It goes like: "Hello, you've reached Gail's number, GAIL. I'm currently unavaliable. Please try again on one of other numbers".
Seed:
33550336
It's certainly up to you whether or not you'd like to explain how you solved it, but I, for one, would love to hear the thought process you went through to come up with the solution.
Drop us an e-mail at pdccount (at) microsoft.com, and we'll coordinate your extremely limited edition PDC2008 internal t-shirt.
IF YOU WANT TO SOLVE THE PUZZLE ON YOUR OWN THEN PLEASE COVER YOUR MONITOR NOW!
The message in the audio file talks about "nothing left to chance", "seed", "ordering samples from the entire collection" and the importance of "the correct seed" being a "perfect number".
The .wav audio file is (like all other such files) made up of a header followed by samples, the actual values of the audio. When combining this together a solution comes to mind of picking samples randomly from the whole list of samples, but starting with some seed of a "perfect number". A further hint for this solution was a remark Mike made, that his friend in the .NET Framework team was behind all this, this could mean that the Random class of the .NET framework could be used for generating the random numbers. I wrote some C# code to do actually that:
Now we only need to pick the value of the seed, preferably a perfect number.
As tfraser pointed out in the comments, there is a mathematical concept of a perfect number.
There are only 5 such numbers that can be represented by Int32 (which is the type of the seed parameter to the Random class constructor). When we use the 5th perfect number (33550336) as a seed we get a new audio message. This message says:
"Hello, you have reached Carol's number, thats C A R O L. I am currently unavailable please try again using one of my other numbers"
Well since the perfect number was a mathematically defined number, is there perhaps something called a Carol Number? Yes indeed there is, and one of them, 1046527, yields a (somewhat better quality) audio file that asks the question: "What's the name of our PDC 2008 marketing manager?"
Honestly, I thought that this puzzle would take a little bit longer to solve.
If I get an XL sized T-Shirt I could probably spare you the right arm
Thank you, Fridjon. That’s very generous of you. I mean both your comment and the right arm offer
My plan now is to see what Mike comes up with this week. If I’m lucky, I might earn a left arm from someone else’s t-shirt. Eventually, I hope to end up
with a unique stitched thing with some history behind it. It’d be nice if the pieces were in different colours and signed by the owners

Remove this comment
Remove this thread
close