Play sound with Monotouch

Question

No matter what I try (build → content, NSUrl, filename), I get a "null exception": the file was not found when I try to play the .caf sound file in monotouch.

//var path = NSBundle.MainBundle.PathForResource("MatchGame", "caf"); //var gameSong = SystemSound.FromFile( new NSUrl(path, false)); var gameSong = SystemSound.FromFile("MatchGame.caf"); gameSong.PlaySystemSound(); 

I am also trying to use combinations by using the folder name "images / MatchGame.caf" and moving MatchGame.caf to the root folder.

What am I missing? Thank you very much.

Here is a link to the video with the addition of sound in a single point. http://www.screencast.com/t/MmE0ZmFh What is wrong?

Answer 1

Brian,

From looking at your screencast, you are trying to play an mp3 file, not a file in a cafe. Mp3 files are encoded differently and will not play with the SystemSound class, which is (I cannot remember if you can do this in Obj-C or not.)

You want to use the AVFoundation namespace and the AVAudioPlayer class.

 using Monotouch.AVFoundation; var mediaFile = NSUrl.FromFilename("myMp3.mp3"); var audioPlayer = AVAudioPlayer.FromUrl(mediaFile); audioPlayer.FinishedPlaying += delegate { audioPlayer.Dispose(); }; audioPlayer.Play(); 

You may need to tweak the code above - I don't have MonoDevelop, but that should help you a bit further.

Greetings

Chrisntr

Answer 2

You need the first line:

var path = NSBundle.MainBundle.PathForResource ("MatchGame", "caf");

Then make sure your audio file is included in the application, making sure that your CAF file is marked as “Content” in the “Properties” panel, otherwise the file will not be copied to the resulting application package (your .app)

You can follow the steps described here (they are for images, but apply to audio files):

http://wiki.monotouch.net/HowTo/Images/Add_an_Image_to_your_Project

It is also a good resource for storing files:

http://wiki.monotouch.net/HowTo/Files/HowTo%3a_Store_Files