所以我有当前的代码:
- (void)viewDidLoad
{
[super viewDidLoad];
//for recording audio
_stopButton.enabled = NO;
_playButton.hidden = true;
NSArray *dirPaths;
NSString *docsDir;
dirPaths = NSSearchPathForDirectoriesInDomains(
NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = dirPaths[0];
NSString *soundFilePath = [docsDir
stringByAppendingPathComponent:@"recording.caf"];
NSURL *soundFileURL = [NSURL fileURLWithPath:soundFilePath];
NSDictionary *recordSettings = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:kAudioFormatMPEG4AAC], AVFormatIDKey,
[NSNumber numberWithFloat:44100.0], AVSampleRateKey,
[NSNumber numberWithInt:1], AVNumberOfChannelsKey,
[NSNumber numberWithInt:AVAudioQualityHigh], AVSampleRateConverterAudioQualityKey,
[NSNumber numberWithInt:128000], AVEncoderBitRateKey,
[NSNumber numberWithInt:16], AVEncoderBitDepthHintKey,
nil];
NSError *error = nil;
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryPlayAndRecord
error:nil];
_audioRecorder = [[AVAudioRecorder alloc]
initWithURL:soundFileURL
settings:recordSettings
error:&error];
if (error)
{
NSLog(@"error: %@", [error localizedDescription]);
} else {
[_audioRecorder prepareToRecord];
}
//----------------------------
//end
}
玩家:
- (IBAction)playAudio:(id)sender {
[_playButton setEnabled:NO];
if (!_audioRecorder.recording)
{
_stopButton.enabled = YES;
_recordButton.enabled = NO;
NSError *error;
_audioPlayer = [[AVAudioPlayer alloc]
initWithContentsOfURL:_audioRecorder.url
error:&error];
_audioPlayer.volume = 5;
_audioPlayer.delegate = self;
if (error)
NSLog(@"Error: %@",
[error localizedDescription]);
else
[_audioPlayer play];
}else{
NSLog(@"errormax");
}
}
_audioPlayer.volume
位于5
,因为你可以在这里找到它。但它在那个音量上偷看并听起来非常扭曲。为什么它听起来不像"语音备忘录"它在没有扭曲的情况下以合理的音量回放它?
最优质的设置是什么?
答案 0 :(得分:1)
我个人更喜欢PCM编码,使用它的质量更好。
尝试:
NSDictionary *recordSettings =
[NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:kAudioFormatLinearPCM], AVFormatIDKey,
[NSNumber numberWithFloat:44100.0], AVSampleRateKey,
[NSNumber numberWithInt:2], AVNumberOfChannelsKey,
[NSNumber numberWithInt:16], AVLinearPCMBitDepthKey,
[NSNumber numberWithBool:NO], AVLinearPCMIsBigEndianKey,
[NSNumber numberWithBool:NO], AVLinearPCMIsFloatKey,
nil];
或使其更具可读性:
NSDictionary * recordSetting;
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];
像这样调整你的功能:
- (IBAction)playAudio:(id)sender {
[_playButton setEnabled:NO];
if (!_audioRecorder.recording)
{
_stopButton.enabled = YES;
_recordButton.enabled = NO;
//force the session to play to come out of speakers!
UInt32 sessionCategory = kAudioSessionCategory_MediaPlayback;
AudioSessionSetProperty(kAudioSessionProperty_AudioCategory, sizeof(sessionCategory), &sessionCategory);
UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;
AudioSessionSetProperty (kAudioSessionProperty_OverrideAudioRoute,sizeof (audioRouteOverride),&audioRouteOverride);
NSError *error;
_audioPlayer = [[AVAudioPlayer alloc]
initWithContentsOfURL:_audioRecorder.url
error:&error];
_audioPlayer.delegate = self;
[_audioPlayer prepareToPlay];
if (error)
NSLog(@"Error: %@",
[error localizedDescription]);
else
[_audioPlayer play];
}else{
NSLog(@"errormax");
}
}
答案 1 :(得分:1)
这是因为音频会话类别" AVAudioSessionCategoryPlayAndRecord"。除非您明确更改overrideOutputAudioPort,否则它始终在接收器中播放音频。您可能必须为AVAudioSessionRouteChangeNotification添加侦听器,以根据您的输出更改类别。无论如何为什么这么头疼,只需在开始录制之前使用AVAudioSessionCategoryRecord并在启动播放器之前使用AVAudioSessionCategoryPlayback。
//播放器
newPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:fileURL error:nil];
NSError *setCategoryError = nil;
[audioSession setCategory: AVAudioSessionCategoryPlayback error: &setCategoryError];
//记录
newRecorder = [[AVAudioRecorder alloc]initWithURL:fileURL settings:recordSettings error:&error];
NSError *setCategoryError = nil;
[audioSession setCategory: AVAudioSessionCategoryRecord error: &setCategoryError];