avaudioplayer

I like to update an existing iPhone application which is using AudioQueue for playing audio files. The levels (peakPowerForChannel, averagePowerForChannel) were linear form 0.0f to 1.0f. Now I like to use the simpler class AVAudioPlayer which works fine, the only issue is that the levels which are now in decibel, not linear from -120.0f to 0.0f. Has anyone a formula to convert it back to the linear values between 0.0f and 1.0f? Thanks Tom Several Apple examples use the following formula to convert the decibels into a linear range (from 0.0 to 1.0): double percentage = pow (10, (0.05 * power));

I am trying to play a short sound when user taps on the specific button. But the problem is that I always receive Object reference not set to an instance object . means Null! I first tried MonoTouch.AudioToolBox.SystemSound. MonoTouch.AudioToolbox.AudioSession.Initialize(); MonoTouch.AudioToolbox.AudioSession.Category = MonoTouch.AudioToolbox.AudioSessionCategory.MediaPlayback; MonoTouch.AudioToolbox.AudioSession.SetActive(true); var t = MonoTouch.AudioToolbox.SystemSound.FromFile("click.mp3"); t.PlaySystemSound(); Let me notice that "click.mp3" is in my root solution folder and it is flagged

I have spent days researching on SO and other websites for the answer to this but without any luck. Essentially, the challenge I've set for myself is to create an alarm clock app for iOS that will sound no matter where the user may be (foreground or background). This I have already accomplished by using an AVAudioPlayer instance and starting to play an empty sound file when the user sets the alarm in order for the app to keep running in the background. When it is time for the alarm to go off (ie when the NSTimer is fired) a second player, which has already been initiated and prepared to play,

So hey I've been searching around, trying to find a way to solve this, but there's basically no solutions to this yet. I desperately need a way to instantiate and play a sound whenever I want, without it cutting out any other sounds. I know that AVAudioPlayer can only play one sound at a time, so I'm trying to figure out how to make a dynamic array of AVAudioPlayers that I can add to any time I need to play a sound. My current code, that I got from a different answer on this site, is this: func Sound(sound: String) { do { if let bundle = NSBundle.mainBundle().pathForResource(sound, ofType:

I work on speech recognition. I solve the text-to-speech and speech-to-text with IOS frameworks. But now i want to convert saved audio file conversations to text. How can i solve this ? Thank you for all replies. I have worked on same things which are working for me. I have audio file in my project bundle which. So I have written following code to convert audio to text. let audioURL = Bundle.main.url(forResource: "Song", withExtension: "mov") let recognizer = SFSpeechRecognizer(locale: Locale(identifier: "en-US")) let request = SFSpeechURLRecognitionRequest(url: audioURL!) request

I'm trying to understand AVAudioPlayer and audio level metering. What I have below is an object "AudioPlayer" that is playing a short audio sound. Now I want to output the power of this sound (decibels). Somehow I don't think I'm doing this right. audioPlayer.meteringEnabled = YES; [audioPlayer play]; int channels = audioPlayer.numberOfChannels; [audioPlayer updateMeters]; for (int i=0; i<channels; i++) { //Log the peak and average power NSLog(@"%d %0.2f %0.2f", i, [audioPlayer peakPowerForChannel:0],[audioPlayer averagePowerForChannel:0]); The NSLog output of this is 0 -160.00 -160.00 1 -160