avaudioplayer

Is this the right way to check AVAudioPlayer's current playback time. [audioPlayer play]; float seconds = audioPlayer.currentTime; float seconds = CMTimeGetSeconds(duration); How I can code after [audioPlayer play]; that when currentTime is equal to 11 seconds then [self performSelector:@selector(firstview) withObject:nil]; and after firstview when currentTime is equal to 23 seconds [self performSelector:@selector(secondview) withObject:nil]; gregheo You could set up a NSTimer to check the time periodically. You would need a method like: - (void) checkPlaybackTime:(NSTimer *)theTimer { float

I working on a little app where i want the phone to play a sound file on an event from my location controller. The problem is when the App is in Background mode the AVAudioPlayer not start the Audio file but the code is scheduled, getting NSLog output. Another thing is it works in the simulator but not on the phone. Whys not? This is my code to play the file: - (void)tryPlayTaleSound:(NSString*)fileName { NSString *backgroundMusicPath = [[NSBundle mainBundle] pathForResource:fileName ofType:@"mp3"]; NSURL *backgroundMusicURL = [NSURL fileURLWithPath:backgroundMusicPath]; NSError *error;

I've an app which uses the MPAudioPlayerController to access the iPod music library, and an AVAudioPlayer to overlay audio on top of the music. I've used this documentation as a guide. Specifically: Finally, you can enhance a category to automatically lower the volume of other audio when your audio is playing. This could be used, for example, in an exercise application. Say the user is exercising along to their iPod when your application wants to overlay a verbal message—for instance, “You’ve been rowing for 10 minutes.” To ensure that the message from your application is intelligible, apply

I have an instance of AVAudioPlayer that will play several sounds. Is there a way to provide an AVAudioPlayer instance with a new sound, or do I have to create a new instance with initWithData:? zoul Reusing objects is usually a bad idea, generally try to have your objects as short-lived as possible. This reduces the number of possible states of your code and makes reasoning about it easier. (“Where did this value come from? Maybe it’s a leftover from the previous instance usage?” Yuck.) Only break this rule once you run into measurable problems. For further reading along this line of thought

Is it possible to play system beep alert sound.I do not want to add the sound file to my resource bundle and i want to access the apple system sounds and play it wherever needed. Try this AudioServicesPlaySystemSound(1103); to vibrate AudioServicesPlaySystemSound(kSystemSoundID_Vibrate); For list of sounds http://iphonedevwiki.net/index.php/AudioServices 来源： https://stackoverflow.com/questions/18711983/how-to-play-system-beep-sound-programatically-in-iphoneis-it-possible-to-play-s

My goal is to create a "Chirper" class. A chirper should be able to emit a procedurally generated chirp sound. The specific idea is that the chirp must be procedurally generated, not a prerecorded sound played back. What is the simplest way to achieve a procedurally generated chirp sound on the iPhone? You can do it with a sine wave as you said, which you would define using the sin functions. Create a buffer as long as you want the sound in samples, such as: // 1 second chirp float samples[44100]; Then pick a start frequency and end frequency, which you probably want the start to be higher