AVAudioRecorder « audio « iPhone iPad Media Q&A

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iPhone iPad Media Q&A » audio » AVAudioRecorder 

1. How do I record audio on iPhone with AVAudioRecorder?    stackoverflow.com

Now that iPhone 3.0 sdk is public, I think I can ask this question for those of you that have already been playing with the 3.0 sdk. I want to ...

2. iPhone - AVAudioRecorder - how can I record to an mp3?    stackoverflow.com

I am using the AVAudioRecorder class available with the 3.0 SDK to record audio in my app. I am successfully able to record to a caf/aiff file. But I would like to ...

3. iPhone - stuff "silence" in the beginning of an audio file    stackoverflow.com

I am using AVAudioRecorder in my app in order to create a .wav file based on user voice input. I want to be able to stuff" silence in the beginning of ...

4. iPhone - show audio record feedback using AVAudioRecorder    stackoverflow.com

I am using the AVAudioRecorder class to record to a wav file. I would like to implement a recording feedback (like the SpeakHere example) which shows the recording level. I did go ...

5. Semi-Comprehensive AVAudioRecorder Tutorial?    stackoverflow.com

After doing a lot of searching and getting a basic idea of how to implement iPhone audio recording with AVAudioRecorder, I still have not managed to get it working. Can anyone ...

6. Sample rate for iPhone audio recording    stackoverflow.com

What's the lowest optimal sample rate for audio recording on iPhone while still yielding good file size? Currently I am using 44.1kHz but it produces file that's way too big. ...

7. how to resume recording after interruption occured in iphone?    stackoverflow.com

I am working on an audio recorder application, it is working perfectly fine. But I'm stuck with the problem of interruption. When a call comes,

- (void)audioRecorderBeginInterruption:(AVAudioRecorder *)recorder
then this method is called and ...

8. AVAudioRecorder - Continue recording to file after user stops recording by leaving the application and then re-opens it    stackoverflow.com

Can this be done? And if not, how far down towards Core Audio do I need to go (what method of recording should I be using instead)? I've noticed the behavior of ...

9. iPhone SDK: AVAudioRecorder metering -- how to change peakPowerForChannel from decibel into percentage?    stackoverflow.com

The AVAudioRecorder in the iPhone SDK can be used to get the peak and average power for a channel, in decibels. The range is between 0db to 160db. What is the ...

10. AVAudioRecorder Memory Leak    stackoverflow.com

I'm hoping someone out there can back me up on this... I've been working on an application that allows the end user to record a small audio file for later playback and ...

11. AVAudioRecorder File won't play except with VLC    stackoverflow.com

Ok. I think I'm missing something here and I'm new to Core Audio but I have scoured the Apple documents and the rest of the web to no avail. I've also posted ...

12. Mail the recorded audio    stackoverflow.com

In my app i am recording audio. I want to mail the recorded audio file. I am doing like this. MFMailComposeViewController *controller = [[MFMailComposeViewControlleralloc] init]; controller.mailComposeDelegate =self ; NSData *myData = [NSData dataWithContentsOfURL:url]; Here ...

13. How can I append to a recorded MPEG4 AAC file?    stackoverflow.com

I'm recording audio on an iPhone, using an AVAudioRecorder with the following settings:

NSMutableDictionary *recordSettings = [[NSDictionary alloc] initWithObjectsAndKeys:
       [NSNumber numberWithInt: kAudioFormatMPEG4AAC], AVFormatIDKey,
    ...

14. iPhone SdK: AVPlayer will not play a composition after adding a audio track    stackoverflow.com

After adding an audio track (recorded with AVAudioRecorder) to a composition AVPlayer will not play it. AVPlayer.status = 1 and AVPlayer.error = null. I have looked at the WWDC10 AVEdit demo code ...

15. how to make audio meter level with avaudiorecorder    stackoverflow.com

I am trying to create a audio meter level while I am recording the user voice using avaudiorecorder. Can someone help me in that regard?

16. Recording Chunked Audio in Background iOS    stackoverflow.com

I'm trying to figure out a way to record audio in the background of an iOS application and have it streamed to the server. I've pretty much got this working for when ...

17. AVAudioRecorder - Metering to voice detect    stackoverflow.com

I need to develop an App witch plays an mp3 when a Voice is detected. Can I use the Speak here example? or does someone know an example of something like ...

18. iPhone SDK AVAudioRecorder delay before recording    stackoverflow.com

I'm using the AVAudioRecorder to grab audio from the microphone. The problem i'm facing is this: the first time I start recording there is a 2 second delay between when I ...

19. how to display audio meter in iphone using objective C    stackoverflow.com

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 ...

20. implementing iphone Voice Memo: read many topics but i miss something    stackoverflow.com

i have readed this topic: topic and wrote, with the help of this article mic blow detection something like:

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

NSDictionary *settings = [NSDictionary dictionaryWithObjectsAndKeys:
    [NSNumber ...

21. iPhone - Recording audio played only by app    stackoverflow.com

I'm creating some application that plays sounds like piano, drums etc. I have a recording feature in that. Its recording well and good. I'm using AVAudioRecorder. But along with application sound, outside sound ...

22. combine two .caf audio files into a single audio file in iphone    stackoverflow.com

I am using AVAudioRecorder for recording audio in .caf format. When the user will resume this recording the new recording must append with the old recording. So how can i combine ...

23. Finding the length of an audio recording in iPhone    stackoverflow.com

I am recording the audio using avaudiorecorder. How do I find the length of the recording after saving the recording in a .caf file?

24. How to dectect silence in AVAudioRecorder?    stackoverflow.com

I use AVAudioRecorder for voice recording. Currently I use averagePowerForChannel and peakPowerForChannel to show a dynamic meter. How can I detect silence (no body speaks for 1 second) and so I ...

25. problem with recording the 1st 10 seconds of mic using AVRecorder in iPhone    stackoverflow.com

I am using the following code to record audio and play it back, however I am not sure what I am doing wrong, I am not getting any sound when I ...

26. Combine two audio files together and play them in iPhone    stackoverflow.com

I do not want any code but want to get a reference about my question mentioned below... There is background music available and there is recording option in my app... Once I start ...

27. Problem in AVAUDIORECORDER detection    stackoverflow.com

I want to detect voice of any buddy(Note: i am not going to press any button just sense the voice and start recording) User can speak and my application detect sound ...

28. iPhone AVAudioRecorder pause problem after entering background    stackoverflow.com

I have a problem with pausing AVAudioRecorder after entering background. Basically, it goes like this (_recorder is my AVAudioRecorder instance):

  1. Start recording:
    [_recorder record];
    
  2. Press the home button on the device.
  3. Because I've set ...

29. AVAudioRecorder meter delay on iPad    stackoverflow.com

I am having trouble getting an accurate meter reading from the AVAudioRecorder (testing on iPad). It seems to work fine while the volume is rising, however a delay happens when the ...

30. AVAudio detect note/pitch/etc. iPhone xcode objective-c    stackoverflow.com

I'm making an app on the iphone and I need a way of detecting the tune of the sounds coming in through the microphone. (I.e. A#, G, C?, etc.) I assumed I'd ...

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