iOS AVAudioRecorder 录音频率、声道、位数配置 wav格式

iOS AVAudioRecorder 录音频率、声道、位数配置

#pragma mark 录音设置

- (void)setUP_VOICE_RECOARDER

{

    NSError *error = nil;

    audioSection = [AVAudioSession sharedInstance];

    [audioSection setCategory:AVAudioSessionCategoryPlayAndRecord error:&error];

    if (error) {

        NSLog(@"录音配置错误:%@",error);

        [self showBackAlertWith:error.description];

        return;

    }

    //16kHZ,单通道，16位，wav

    //[NSNumber numberWithInt:AVAudioQualityHigh],AVEncoderAudioQualityKey,

    NSMutableDictionary* recordSetting = [NSMutableDictionary dictionaryWithObjectsAndKeys:

                                          [NSNumber numberWithFloat:], AVSampleRateKey,

                                          [NSNumber numberWithInt:kAudioFormatLinearPCM],AVFormatIDKey,

                                          [NSNumber numberWithInt:], AVNumberOfChannelsKey,

                                          [NSNumber numberWithInt:], AVLinearPCMBitDepthKey,

                                          [NSNumber numberWithBool:NO],AVLinearPCMIsBigEndianKey,

                                          [NSNumber numberWithBool:NO],AVLinearPCMIsFloatKey,

                                          nil];

    NSURL *recordedTmpFile = [NSURL fileURLWithPath:[[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:] stringByAppendingPathComponent: [NSString stringWithFormat: @"%.0f.%@", [NSDate timeIntervalSinceReferenceDate] * 1000.0, @"wav"]]];  //文件名的设置

    voiceURL = recordedTmpFile;

    voiceRecorder = [[AVAudioRecorder alloc] initWithURL:recordedTmpFile settings:recordSetting error:NULL];

    NSLog(@"file : %@",recordedTmpFile);

    voiceRecorder.delegate = self;

    voiceRecorder.meteringEnabled = YES;

    [voiceRecorder prepareToRecord];

}