avaudiorecorder

I am using AVAudioRecorder to record audio and save to a wav file (using SDK 3.0) The settings dictionary contains the following values NSMutableDictionary *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

i have converted my .caf audio file to NSData object using the following line of code: NSData *audioData = [NSData dataWithContentsOfFile:[MyRecorderFilePathURL path] options: 0 error:&err]; I am doing so to upload the binary object to a server through a web service. How do i convert audioData back to a .caf file which can be played using AVAudioPlayer ? AVAudioPlayer has a method for playing sound from NSData object . You can use - (id)initWithData:(NSData *)data error:(NSError **)outError method of AVAudioPlayer 来源： https://stackoverflow.com/questions/9157916/converting-nsdata-back-to-audio

I'm recording audio using device microphone with AVAudioRecorder which return file in .caf format that is playable only in Apple devices but not on Android devices. Since Apple is not supporting .mp3 file so I want to convert it in .mp4 format before uploading to server. Is .mp4 is good for audio only? Can I convert it with AVAssetExportSession ? Following is audio recorder code: func setupAudioRecorder () { let fileMgr = FileManager.default let dirPaths = fileMgr.urls(for:.documentDirectory, in:.userDomainMask) let soundFileURL = dirPaths[0].appendingPathComponent("myaudio.caf") let

This question already has an answer here: How to measure noise or sound and displays in dB(A) in iphone? 1 answer I have an audio recorder and I was wondering if anyone has a code to show a audio meter (the bar that most of audio recorders have which shows the level of input audio). Jonah Apple's SpeakHere example code includes a LevelView class which seems to be exactly what you are looking for. Heres an example that calculates output and prints it: - (void)viewDidLoad { [super viewDidLoad]; NSURL *url = [NSURL fileURLWithPath:@"/dev/null"]; // Your audio save path NSDictionary *settings =