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

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概述

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:16000], AVSampleRateKey,
[NSNumber numberWithInt:kAudioFormatLinearPCM],AVFormatIDKey,
[NSNumber numberWithInt:1], AVNumberOfChannelsKey,
[NSNumber numberWithInt:16], AVLinearPCMBitDepthKey,
[NSNumber numberWithBool:NO],AVLinearPCMIsBigEndianKey,
[NSNumber numberWithBool:NO],AVLinearPCMIsFloatKey,
nil];
NSURL *recordedTmpFile = [NSURL fileURLWithPath:[[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0] 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];
}