core-audio

I'm looking on this example http://teragonaudio.com/article/How-to-do-realtime-recording-with-effect-processing-on-iOS.html and i want to turn off my output. I try to change: kAudioSessionCategory_PlayAndRecord to kAudioSessionCategory_RecordAudio but this is not working. I also try to get rid off: if(AudioUnitSetProperty(*audioUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output, 1, &streamDescription, sizeof(streamDescription)) != noErr) { return 1; } Becouse i want to get sound from microphone but not playing it. But not matter what i do when my sound get to renderCallback method

I am developing one music streaming application. I can stream mp3 using a method described here . Does anybody know approach to stream other formats(ASX, RTSP or mms) using Core Audio or other framework. Thanks in advance. mms, ASX, and RTSP are historically somewhat proprietary protocols (by microsoft and real, in particular), so you may have trouble finding an official apple implementation. There's a LGPL implementation of the mms protocol here: https://launchpad.net/libmms Or you can get the documentation for the protocol from microsoft here: http://download.microsoft.com/download/9/5/E

I have added the iPhone's Tock sound to my own custom keyboard like this: NSString *path = [[NSBundle bundleWithIdentifier:@"com.apple.UIKit"] pathForResource:@"Tock" ofType:@"aiff"]; SystemSoundID soundID; AudioServicesCreateSystemSoundID((CFURLRef)[NSURL fileURLWithPath:path], &soundID); AudioServicesPlaySystemSound(soundID); // we don't dispose of the sound to keep the sound in the cache for the next time //AudioServicesDisposeSystemSoundID(soundID); In iPhone OS 3.1, however, the keyboard Tock sound has been muffled, e.g. is much more silent than other sounds and than it was in 3.0. My

I've an app which uses the MPAudioPlayerController to access the iPod music library, and an AVAudioPlayer to overlay audio on top of the music. I've used this documentation as a guide. Specifically: Finally, you can enhance a category to automatically lower the volume of other audio when your audio is playing. This could be used, for example, in an exercise application. Say the user is exercising along to their iPod when your application wants to overlay a verbal message—for instance, “You’ve been rowing for 10 minutes.” To ensure that the message from your application is intelligible, apply

Okay, I have my AVAudioSession defined with the following (yes, mix of the c and obj-c calls) Also note that the app has background mode audio, because if recording it must continue to do so while the app is in the background: [(AVAudioSession *)[AVAudioSession sharedInstance] setDelegate: self]; // Allow the app sound to continue to play when the screen is locked. [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord error:nil]; //Turn off automatic gain on the microphone [[AVAudioSession sharedInstance] setMode:AVAudioSessionModeMeasurement error:nil]; //Turn on

In Objective-C, recording and playing audio simultaneously is fairly simple. And there are tonnes of sample code on the internet. But I want to record and play audio simultaneously using Audio Unit/Core Audio in Swift. There are vary small amount of help and sample code on this using Swift. And i couldn't find any help which could show how to achieve this. I am struggling with the bellow code. let preferredIOBufferDuration = 0.005 let kInputBus = AudioUnitElement(1) let kOutputBus = AudioUnitElement(0) init() { // This is my Audio Unit settings code. var status: OSStatus do { try