Programming Languages When I try to play the sound file 'Windows Critical Stop.wav' I get the following exception: exec {'Sound API only supports There are 3 different sounds it should play depending on the situation, so I created a wrapper class around the SoundPlayer object and call the. The following code works with some wav files, but with others I get, 'InvalidOperationException was unhandled. Message=Sound API only supports playing PCM wave files.'
There are several ways of accomplishing playing Audio in with the Pros ans Cons of their own. The choices of Audio are represented by several different.1. SoundPlayer 2. SoundPlayerAction 3.MediaPlayer.4.
MediaElement and MediaTimeline SoundPlayer 1. It only supports.
It has no support for playing multiple sounds simultaneously. (Any new sound being played interrupts a currently playing sound.) 3. It has no support for varying the volume of sounds. It is, however, the most lightweight approach for playing a sound, so it’s very appropriate for simple. The following code shows how to use SoundPlayer to play a sound: SoundPlayer player = new SoundPlayer(“testAudio.wav”); player.Play; SoundPlayerAction If you want to use SoundPlayer to add simple sound effects to user interface events such as hovering over or clicking a Button, you can easily define the appropriate event handlers that use SoundPlayer in their implementation.
However, WPF defines a SoundPlayerAction class (which derives from TriggerAction ) that enables you to use SoundPlayer without writing any. The following snippet adds EventTriggers directly to a Button that play an audio file when the Button is clicked or the mouse pointer enters its bounds: MediaPlayer If the limitations of SoundPlayer and SoundPlayerAction are not acceptable, you can use the WPF-specific MediaPlayer class in the System.Windows.Media namespace. It is built on top of, so it supports all of its (.wav,.wma,.mp3, and so on). Multiple sounds can be played simultaneously (although via different instances of MediaPlayer), and the volume can be controlled by setting its Volume property to a double between 0 and 1 (with 0.5 as the default value). But MediaPlayer has even more features for giving you a lot of control over the audio: – You can pause the audio with its Pause method (if CanPause is true). – You can mute the audio by setting its IsMuted property to true.
– You shift the balance toward the left or right speaker by setting its Balance property to a value between -1 and 1.1 means that all the audio is sent to the left speaker, 0 (the default) means that all the audio is sent to both speakers, and 1 means that all the audio is sent to the right speaker. – For audio formats that support it, you can speed up or slow down the audio (without affecting its pitch) by setting its SpeedRatio property to any nonnegative double value.
1.0 is the default value, so a value less than 1.0 slows it down, whereas a value greater than 1.0 speeds it up. – You can get the length of the with its NaturalDuration property (which is unaffected by SpeedRatio) and get the current position with the Position property.If the audio format supports seeking, you can even set the current position with the Position property. Here is the simplest way to use MediaPlayer to play an audio file: MediaPlayer player = new MediaPlayer; player.Open(new Uri(“music.wma”, UriKind.Relative)); player.Play; MediaElement and MediaTimeline MediaElement is a full-blown FrameworkElement in the System.Windows.Controls namespace, so it’s meant to be embedded in a user interface, it participates in layout, and so on. (This sounds odd until you realize that MediaElement is also used for video, as discussed in the next section.) MediaElement exposes most of the properties and events of MediaPlayer as dependency properties and routed events. You can set MediaElement’s Source property to the URI of an audio file, but it would play as soon as the element is loaded. Instead, to declaratively play sounds at arbitrary times, you should set Source on the fly using animation with a MediaTimeline. Just like the earlier example that uses SoundPlayerAction, the following XAML shows how to use MediaElement and MediaTimeline to play an audio file when a Button is clicked or the mouse pointer enters its bounds: In addition to the BeginStoryboard action, you can use the same Storyboard with the PauseStoryboard, ResumeStoryboard, SeekStoryboard, and StopStoryboard actions to pause, resume, seek, and stop the audio.