Start your free trial now, and begin learning software, business and creative skills—anytime, anywhere—with video instruction from recognized industry experts.

Start Your Free Trial Now

Capture sound Windows Phone SDK

Capturing sound provides you with in-depth training on Developer. Taught by Michael Lehman as part o… Show More

Windows Phone SDK Essential Training

with Michael Lehman

Video: Capture sound Windows Phone SDK

Capturing sound provides you with in-depth training on Developer. Taught by Michael Lehman as part of the Windows Phone SDK Essential Training
Expand all | Collapse all
  1. 2m 35s
    1. Welcome
    2. What you need to know to take this course
    3. Using the exercise files
  2. 15m 45s
    1. Downloading and installing the Windows Phone tools
      2m 44s
    2. Creating a Hello World application
      9m 32s
    3. Debugging on a Windows Phone device
      3m 29s
  3. 6m 29s
    1. Exploring device capabilities
      2m 58s
    2. Understanding the Emulator
      3m 31s
  4. 8m 51s
    1. Understanding the SDK
      8m 51s
  5. 41m 32s
    1. Introducing the converter
      3m 36s
    2. Creating the user experience (UX)
      13m 35s
    3. Responding to the Application Bar
      2m 40s
    4. Implementing click handlers
      3m 52s
    5. Saving and loading settings
      8m 18s
    6. Preparing your app for shipment
      9m 31s
  6. 20m 49s
    1. Introducing sonnets
      1m 38s
    2. Data binding with Silverlight
      4m 4s
    3. Exploring the Model-View-ViewModel pattern (MVVM)
      4m 3s
    4. Implementing the Master-Detail pattern using pages
      3m 53s
    5. Loading external data
      7m 11s
  7. 50m 27s
    1. Choosing a multipage controller
      3m 13s
    2. Preparing for persistence
      7m 30s
    3. Updating the data model
      7m 2s
    4. Creating the details page
      4m 30s
    5. Bringing it all together
      3m 58s
    6. Cloning a Windows Phone app
      6m 49s
    7. Using SQL CE
      8m 49s
    8. Updating the data model
      2m 24s
    9. Querying and updating the database
      6m 12s
  8. 14m 19s
    1. Working with the camera
      6m 11s
    2. Exploring GPS
      5m 21s
    3. Exploring the accelerometer
      2m 47s
  9. 29m 35s
    1. Introducing recording and playback with XNA
    2. Capturing sound
      5m 12s
    3. Providing feedback while recording
      5m 50s
    4. Playing a recording
      4m 34s
    5. Persisting a recording
      2m 58s
    6. Listing recordings
      5m 15s
    7. Managing the recording list
      3m 26s
    8. Recording under the lock screen
      1m 35s
  10. 28m 32s
    1. Building the UX
      3m 54s
    2. Using WebClient
      4m 1s
    3. Determining network connectivity
      2m 9s
    4. Leveraging Internet Explorer
      7m 56s
    5. Adding a live tile
      2m 42s
    6. Building a background agent
      7m 50s
  11. 14m 46s
    1. Hello World in C++
      4m 35s
    2. Libraries
      4m 17s
    3. Managed plus managed
      5m 54s
  12. 26m 36s
    1. Exploring built-in controls
      4m 28s
    2. Windows Phone Toolkit
      2m 42s
    3. Introducing Coding4Fun
      3m 14s
    4. Reminders and notifications
      6m 10s
    5. Wallet and In-App Purchase
      1m 34s
    6. File and protocol associations
      1m 59s
    7. Bluetooth
    8. Integrating speech
      1m 28s
    9. Near field communication (NFC)
      1m 23s
    10. WinRT and legacy Windows Phone APIs
      2m 54s
  13. 12m 15s
    1. Publishing your apps
      2m 49s
    2. Learning from apps in the Windows Phone Marketplace
      1m 23s
    3. Staying in touch with updates and new information from Microsoft
      2m 34s
    4. Looking at Windows Phone 7 app reviews
    5. Exploring web sites books and other useful links
      4m 45s
  14. 1m 34s
    1. Farewell
      1m 34s

please wait ...
Capturing sound
Video Duration: 5m 12s 4h 33m Beginner


Capturing sound provides you with in-depth training on Developer. Taught by Michael Lehman as part of the Windows Phone SDK Essential Training

View Course Description

Discover how to build professional apps that encompass the 17 major feature areas of Windows Phone, from XAML to multimedia to network access. In this course, author Michael Lehman details the standard hardware device configuration, teaches how to navigate the development environment, and explores the Windows Phone APIs. The course shows how to build sample applications while learning Windows Phone concepts and frameworks, including the Metro design language.

Topics include:
  • Downloading and installing the tools
  • Understanding the SDK
  • Designing the user experience (UX)
  • Implementing commands
  • Data binding with Silverlight
  • Exploring the Model-View-ViewModel (MVVM) pattern
  • Loading external data
  • Capturing data from the camera, GPS, compass, and accelerometer
  • Recording and playing sound
  • Implementing persistence with isolated storage
  • Leveraging built-in tasks, choosers, and launchers
  • Expanding the available controls using the Silverlight and Coding4Fun toolkits
  • Cloning a Windows Phone app
  • Learning how to publish your app
Windows Phone

Capturing sound

All right, so we are going to build the smallest application that we can build that interacts with the Xna Framework and capture sound. Let's take a quick look at the solution. First we added the Xna.Framework and Xna.Framework.GamerServices, Library references so that we can access the Xna.Framework. Then we added a couple of images from the SDK icon library, one of a Microphone and one of a Square or a Stop button so that we can have our button at the bottom of the screen in the Application Bar, toggle back and forth between Record and Stop.

And then finally we've built some code. In our code we have System.Windows. Threading, because we need to create a dispatch timer to create a periodic callback in order to drive the Xna.Framework, and then we have the two Xna.Framework usings so that we can get to the basic framework, and we can also get to the audio which is where the Microphone code is located. In terms of instance variables for our main page here, we have a Microphone object, which is how we're going to ask the system to start feeding us data. We assigned it to the Microphone Default property.

Currently, no Windows Phone devices have more than one Microphone, but in the future it might be possible to differentiate between the hardware Microphone on the device and a microphone on a handset. And we have a buffer in which we are going to put the samples returned to us by the Xna.Framework and then a MemoryStream where we are going to write the buffers out as each buffer comes in. We write it out to the stream so that when we are done we could then save that stream to a file, which we will be doing in a future chapter. And then finally, we have a boolean here inRecordingMode, which we'll use to determine what we should do when someone taps the button on the Application Bar.

If we are not inRecordingMode, we start recording, if we are inRecordingMode, we stop. As I mentioned, in order to use code from the Xna.Framework, we need to essentially pull the Xna.Framework by calling this method FrameworkDispatcher.Update, and this code here in the middle of the screen right now simply creates a timer that fires off every 50 milliseconds and calls Framework.Dispatcher.Update so that we can get frequent updates of data from the Microphone. And finally, in order to start we need to fire it off just once in order to be able to get things going.

When we are ready to figure out how big of a buffer of the data we want, we tell the Microphone how much data we want per callback, in this case we are saying a half a second worth of data, which is good for our first application because we can see the data coming in at a slow enough rate that we can manage. In one of the later recordings in this chapter, we're actually going to cut that way down so that we can actually display some visual feedback which we need to do a lot more quickly than every half a second. And finally, we tell the Microphone, here is your BufferReady handler, here is our EventHandler for when Microphone data is ready, call us back there.

We also have a MainPage_Loaded Event Handler that sets one of the textboxes on our user interface to say Tap record to begin when the page is loaded. Once we start recording, the Microphone code in the Xna.Framework will fire its BufferReady event which we attached to this microphone_BufferReady method and give us a buffer full of data each time. So we write out how much data we got, we can write that stream to the buffer, and then we figure out what position we are within that recording stream and set a text block on our screen so that we can show the user 1 second, 2 second, 3 seconds of recording.

And finally, we have the code that handles our Record button, as we mentioned before, if we are inRecordingMode, we stop, change the text for the button, back to record, set the image for the button, back to the microphone, and set the textbox to say Recording Complete, and of course we set inRecordingMode = False. If we are not recording, we create a new MemorySstream, we go allocate the buffer by asking the Microphone to give it its sample size in bytes based on the duration that we told it. So we said to it we want to be called every half a second.

It's then going to compute how many bytes that is so that we can allocate our buffer, and we change the text of the button to stop, and we change the image to the And Finally, we call microphone.Start which starts the process of the Microphone calling us back, giving its buffers full data, and we set inRecordingMode to true. So let's give this a try. So we have a single portrait page template that we have started with, we set the name to record & play.

We have a text box here where we are going to put the time, and we have our App. bar down here with a Recording button. So we touch the Recording button, and we are now recording. You can see the time is updating, and you can also see a debug output saying we have received 16,000 bytes and then other 16,000 bytes and then other 16,000 bytes. And you can see if you are looking at a large enough screen that the size of the scrollbar thumb here is getting smaller and smaller because this is continuing on, as we get more and more of these lines in the Debug output. So, now we know we have got the basic Recording mechanism going, we are getting data back from the recording, and let's move on to the next part where we will actually take a look at that data and provides some visual feedback of the data actually coming in.

Find answers to the most frequently asked questions about Windows Phone SDK Essential Training .

Expand all | Collapse all
please wait ...
Q: This course was updated on June 10, 2013. What changed
A: This course was updated on June 10, 2013. Revisions include:
  • Over two dozen movies revised to reflect changes to Windows Phone 8 (released October 2012)
  • New instructions for downloading and installing to Windows Phone toolset
  • New instructions for working with Windows Phone 8 device data
  • New chapter on native development with C++
  • New chapter on advanced Windows Phone features including in-app purchasing with Wallet, reminders and notifications, Near Field Communication (NFC), and more.





Don't show this message again
Share a link to this course

What are exercise files?

Exercise files are the same files the author uses in the course. Save time by downloading the author's files instead of setting up your own files, and learn by following along with the instructor.

Can I take this course without the exercise files?

Yes! If you decide you would like the exercise files later, you can upgrade to a premium account any time.

Become a member Download sample files See plans and pricing

Please wait... please wait ...
Upgrade to get access to exercise files.

Exercise files video

How to use exercise files.

Learn by watching, listening, and doing, Exercise files are the same files the author uses in the course, so you can download them and follow along Premium memberships include access to all exercise files in the library.

Exercise files

Exercise files video

How to use exercise files.

For additional information on downloading and using exercise files, watch our instructional video or read the instructions in the FAQ .

This course includes free exercise files, so you can practice while you watch the course. To access all the exercise files in our library, become a Premium Member.

* Estimated file size

Are you sure you want to mark all the videos in this course as unwatched?

This will not affect your course history, your reports, or your certificates of completion for this course.

Mark all as unwatched Cancel


You have completed Windows Phone SDK Essential Training.

Return to your organization's learning portal to continue training, or close this page.


Upgrade to View Courses Offline


With our new Desktop App, Annual Premium Members can download courses for Internet-free viewing.

Upgrade Now

After upgrading, download Desktop App Here.

Become a Member and Create Custom Playlists

Join today and get unlimited access to the entire library of online learning video courses—and create as many playlists as you like.

Get started

Already a member?

Log in

Exercise files

Learn by watching, listening, and doing! Exercise files are the same files the author uses in the course, so you can download them and follow along. Exercise files are available with all Premium memberships. Learn more

Get started

Already a Premium member?

Exercise files video

How to use exercise files.

Ask a question

Thanks for contacting us.
You’ll hear from our Customer Service team within 24 hours.

Please enter the text shown below:

Exercise files

Access exercise files from a button right under the course name.

Mark videos as unwatched

Remove icons showing you already watched videos if you want to start over.

Control your viewing experience

Make the video wide, narrow, full-screen, or pop the player out of the page into its own window.

Interactive transcripts

Click on text in the transcript to jump to that spot in the video. As the video plays, the relevant spot in the transcript will be highlighted.

You started this assessment previously and didn’t complete it.

You can pick up where you left off, or start over.

Resume Start over

Learn more, save more. Upgrade today!

Get our Annual Premium Membership at our best savings yet.

Upgrade to our Annual Premium Membership today and get even more value from your subscription:

“In a way, I feel like you are rooting for me. Like you are really invested in my experience, and want me to get as much out of these courses as possible this is the best place to start on your journey to learning new material.”— Nadine H.

Thanks for signing up.

We’ll send you a confirmation email shortly.

Sign up and receive emails about and our online training library:

Here’s our privacy policy with more details about how we handle your information.

Keep up with news, tips, and latest courses with emails from

Sign up and receive emails about and our online training library:

Here’s our privacy policy with more details about how we handle your information.

submit Lightbox submit clicked
Terms and conditions of use

We've updated our terms and conditions (now called terms of service).Go
Review and accept our updated terms of service.