AVAssetReader kills playback (in AVAudioPlayer)

Question

I am using AVAssetReader to read ipod library asset audio data and render a waveform image. this takes place using code I have described in my answer to this question

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Answer 1

answering my own question....

further searching on SO led me to implementing this alternate solution:

- (void)setupAudio {
    [[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error: nil];
    UInt32 doSetProperty = 1;
    AudioSessionSetProperty (kAudioSessionProperty_OverrideCategoryMixWithOthers, sizeof(doSetProperty), &doSetProperty);
    [[AVAudioSession sharedInstance] setActive: YES error: nil];
}

this was gleaned from here

**EDIT **UPDATED****

I have since made this into a class that also pre-initialises the audio queue (useful in both simulator and device as it eliminates the startup lag from the playback of the first audio file.

you can find the point1sec.mp3 here: http://www.xamuel.com/blank-mp3s/

#import <AVFoundation/AVFoundation.h>
#import "AudioToolbox/AudioServices.h"

@interface sw_AVAudioPlayerSetup : NSObject
 <AVAudioPlayerDelegate> {

}

+ (void)setupAudio ;
+ (void)setupSharedSession ;

@end
@implementation sw_AVAudioPlayerSetup

+ (void)setupSharedSession {

    static BOOL audioSessionSetup = NO;
    if (audioSessionSetup) {
        return;   
    }
    [[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error: nil];
    UInt32 doSetProperty = 1;

    AudioSessionSetProperty (kAudioSessionProperty_OverrideCategoryMixWithOthers, sizeof(doSetProperty), &doSetProperty);

    [[AVAudioSession sharedInstance] setActive: YES error: nil];

    audioSessionSetup = YES;

}

+ (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag{
    // delegate callback to release player
    [player release];
}

+ (void)setupAudio {

    [self setupSharedSession];

    NSString *filepath = [[NSBundle mainBundle]                                                                                                  
                          pathForResource:@"point1sec"                                                                                                 
                          ofType:@"mp3"];

    if ([[NSFileManager defaultManager] fileExistsAtPath:filepath]) {

        AVAudioPlayer* player = [[AVAudioPlayer alloc] 
                                 initWithContentsOfURL:
                                 [NSURL fileURLWithPath:filepath] 
                                 error:nil];

        player.delegate = (id <AVAudioPlayerDelegate>) self;

        [player play];
    }
}