i have bypassed mute settings of iphone (unwanted)

Code:
UInt32 sessionCategory = kAudioSessionCategory_MediaPlayback;

        AudioSessionSetProperty(kAudioSessionProperty_AudioCategory, sizeof(sessionCategory), &sessionCategory);    

        UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;

        AudioSessionSetProperty (kAudioSessionProperty_OverrideAudioRoute,sizeof (audioRouteOverride),&audioRouteOverride);



        //NSLog(@"url");

        NSURL *url = [NSURL fileURLWithPath:@"/dev/null"];

        //NSLog(@"dizionario");

        NSDictionary *audioSettings = [NSDictionary dictionaryWithObjectsAndKeys:

                                       [NSNumber numberWithFloat: 44100.0],                 AVSampleRateKey,

                                       [NSNumber numberWithInt: kAudioFormatAppleLossless], AVFormatIDKey,

                                       [NSNumber numberWithInt: 1],                         AVNumberOfChannelsKey,

                                       [NSNumber numberWithInt: AVAudioQualityMax],         AVEncoderAudioQualityKey,

                                       nil];

        NSError *error;    

        bool b;

        

        

        NSLog(@"audio");

        recorder = [[AVAudioRecorder alloc] initWithURL:url settings:audioSettings error:&error];

        //NSLog(@"audio");

        if (recorder) {

            NSLog(@"prepara");

            b=[recorder prepareToRecord];

            NSLog(@"%@",(b ? @"OK" : @"NO"));

            NSLog(@"meter");

            recorder.meteringEnabled = YES;

            NSLog(@"recorder");

            b=[recorder record];

            NSLog(@"%@", (b ? @"OK" : @"NO"));            

            //        NSLog(@"leveltimer");

            //        levelTimer = [NSTimer scheduledTimerWithTimeInterval: 0.03 target: self selector: @selector(levelTimerCallback:) userInfo: nil repeats: YES];

        } else {

            NSLog(@"************** ERRORE: ****************");

            NSLog([error description]);    

        }     

            

        

        

        

            

        // Grab a reference to the AVAudioSession singleton

        audioSession = [AVAudioSession sharedInstance];

        soundCategory = AVAudioSessionCategoryAmbient;

        [audioSession setCategory:soundCategory error:&audioSessionError];

        

            

        

        // Now we have initialized the sound engine using ambient sound, we can check to see if ipod music is already playing.

        // If that is the case then you can leave the sound category as AmbientSound.  If ipod music is not playing we can set the

        // sound category to SoloAmbientSound so that decoding is done using the hardware.

        isExternalAudioPlaying = [self isExternalAudioPlaying];

        

        if (!isExternalAudioPlaying) {

            soundCategory =AVAudioSessionCategoryPlayAndRecord;// AVAudioSessionCategoryRecord;//AVAudioSessionCategorySoloAmbient;

            audioSessionError = nil;

            [audioSession setCategory:soundCategory error:&audioSessionError];

            if (audioSessionError)

                NSLog(@"WARNING - SoundManager: Error setting the sound category to SoloAmbientSound");

        }

        AudioSessionSetProperty (kAudioSessionProperty_OverrideAudioRoute,sizeof (audioRouteOverride),&audioRouteOverride);