Error while playing audio using AVAudioPlayer

I am getting below error while playing audio. Is this the reason for not playing my audio recording?

Error '!obj' trying to fetch default input device's sample rate
    Error getting audio input device sample rate: '!obj'

- (void)record{    

    AVAudioSession *audioSession = [AVAudioSession sharedInstance];
    NSError *err = nil;
    [audioSession setCategory :AVAudioSessionCategoryPlayAndRecord error:&err];
    if(err){
        NSLog(@"audioSession: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
        return;
    }
    [audioSession setActive:YES error:&err];
    err = nil;
    if(err){
        NSLog(@"audioSession: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
        return;
    }

    recordSetting = [[NSMutableDictionary alloc] init];

    [recordSetting setValue :[NSNumber numberWithInt:kAudioFormatLinearPCM] forKey:AVFormatIDKey];
    [recordSetting setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey]; 
    [recordSetting setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey];

    [recordSetting setValue :[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey];
    [recordSetting setValue :[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsBigEndianKey];
    [recordSetting setValue :[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsFloatKey];

    NSString *fileName = nil;
    if(![myItem audioURL]){
        fileName = [fileFormatter stringFromDate:[NSDate date]];
        [myItem setAudioURL:fileName];
        NSLog(@"file name :%@",fileName);
        NSLog(@"audio url: %@",[myItem audioURL]);

    } else{
        fileName = [myItem audioURL];}

    NSString *pathString = [NSString stringWithFormat:@"%@/%@", [delegate applicationDocumentsDirectory], fileName];

    recorder = [[AVAudioRecorder alloc] initWithURL:[NSURL fileURLWithPath:pathString] settings:recordSetting error:&err];

    // Create a new dated file
    //NSDate *now = [NSDate dateWithTimeIntervalSinceNow:0];
   // NSString *caldate = [now description];
  //  recorderFilePath = [[NSString stringWithFormat:@"%@/%@.caf", DOCUMENTS_FOLDER, caldate] retain];

 //   NSURL *url = [NSURL fileURLWithPath:recorderFilePath];


    if(!recorder){
        NSLog(@"recorder: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
        UIAlertView *alert =
        [[UIAlertView alloc] initWithTitle: @"Warning"
                                   message: [err localizedDescription]
                                  delegate: nil
                         cancelButtonTitle:@"OK"
                         otherButtonTitles:nil];
        [alert show];
        [alert release];
        return;
    }

    //prepare to record
    [recorder setDelegate:self];
    [recorder prepareToRecord];
    recorder.meteringEnabled = YES;

    BOOL audioHWAvailable = audioSession.inputIsAvailable;
    if (! audioHWAvailable) {
        UIAlertView *cantRecordAlert =
        [[UIAlertView alloc] initWithTitle: @"Warning"
                                   message: @"Audio input hardware not available"
                                  delegate: nil
                         cancelButtonTitle:@"OK"
                         otherButtonTitles:nil];
        [cantRecordAlert show];
        [cantRecordAlert release]; 
        return;
    }

    // start recording
    [recorder recordForDuration:(NSTimeInterval) 10];


        recording = YES;

    [pauseButton setImage:[UIImage imageNamed:@"stop.png"] forState:UIControlStateNormal];
    [pauseButton setEnabled:YES];
    [playButton setEnabled:NO];
    [recordButton setEnabled:NO];


    [self beginAnimation];
    //    NSError *error=nil;
    //    if(![context save: &error])
    //    {
    //        //Couldn't save
    //    }
}





- (void)play{         
            NSString *fileName = nil;
        if(![myItem audioURL]){
            return;
        } else
            fileName = [myItem audioURL];
        NSLog(@"file name :%@",fileName);


        NSString *pathString = [NSString stringWithFormat:@"%@/%@", [delegate applicationDocumentsDirectory], fileName];
        NSLog(@"Path : %@",pathString);


        player = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL UrlwithString:pathString] error:nil] ;


    //    if (player==nil) {
    //        NSLog(@"%@",[error description]);
  开发者_StackOverflow中文版  //    }
    //    else
    //    {
            player.volume=1.0;
            NSLog(@"about to play");
            [player prepareToPlay];
            [player play];
            NSLog(@"player play");
            [player setDelegate:self];
            playing = YES;  

            [recordButton setEnabled:NO];
            [pauseButton setEnabled:YES];
            [playButton setEnabled:NO];


            [self beginAnimation];
       // }
    }

Try with this code,

NSURL *url=[NSURL URLWithString:appDelegate.songName];
            NSLog(@"SongURL :%@",url);

            NSData *soundData = [NSData dataWithContentsOfURL:url];


            appDelegate.player = [[AVAudioPlayer alloc] initWithData:soundData error: nil];         
            appDelegate.player.delegate = self;
            appDelegate.player.volume=1.0;  

            // Play the audio
            [appDelegate.player prepareToPlay];             
            [appDelegate.player play];  

this might be helpful to you.

and also add FRameworks and headerfiles(AVFoundation.framework and AVToolbox.framework)

You can use this code to play sound:

 NSString *path = [[NSBundle mainBundle] pathForResource:@"adriantnt_release_click" ofType:@"mp3"];

NSURL *url = [NSURL URLWithString:path];

NSData *data = [NSData dataWithContentsOfURL:url];


AVAudioPlayer* theAudio = [[AVAudioPlayer alloc] initWithData:data error: nil];
theAudio.delegate = self;
theAudio.volume=1.0;

// Play the audio
[theAudio prepareToPlay];
[theAudio play];