core-audio

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Recording Chunked Audio in Background iOS

I am trying to figure out a way to record audio in the background of an iOS application and have it streamed to the server.[详细]

2023-02-20 02:20 分类：问答
kAudioQueueProperty_CurrentLevelMeter on Mac OS X 10.6.7

I am开发者_StackOverflow querying AudioQueueRef for kAudioQueueProperty_CurrentLevelMeter and code that perfectly worked on 10.6.6 now gives me just zeros in level.mAveragePower and level.mPeakPower.[详细]

2023-02-20 00:39 分类：问答
Play a music when Calling app is running - iPhone

In my app, user have the option to call to other people in the contact book. Launch the calling app is easy, but what I want to know is whether we can play a short mu开发者_如何学Csic file when the ca[详细]

2023-02-18 23:59 分类：问答
How can I reduce the speed of sound playing on Iphone using Objective C

I have an开发者_如何学Go mp3 that I want to play slowly without altering the pitch. Is there a way to do it? I can convert into other forms, if I can do it in other forms. This is for a iPhone app tha[详细]

2023-02-18 01:56 分类：问答
Can AVPlayer pre-buffer audio similar to AVAudioPlayer's preparetoplay?

Is there a way to make AVPlayer load audio into a buffer like AVAudioPlayer does when called to prepare开发者_C百科toplay?I\'m trying to eliminate the lag time between when a user presses a play butto[详细]

2023-02-17 15:46 分类：问答
How to manually convert 8.24-bit deinterleaved lpcm to 16-bit lpcm?

I have a chunk of data (void*) which is 2 ch,44100 Hz, \'lpcm\' 8.24-bit li开发者_StackOverflowttle-endian signed integer, deinterleaved.[详细]

2023-02-17 07:25 分类：问答
Random noise when playing Audio with OpenAL on Mac

I am porting a game from iPad to Mac. Every time I start the game, certain set of sounds when they are being played, have an irritating noise at the end of playback, much like a short duration of hea[详细]

2023-02-16 10:16 分类：问答
AudioQueue callback in simulator but not on device

I am currently working on an audio processing app on iPhone. it is based on Apple\'s SpeakHere sample code, aims at real-time audio processing and playback. The code works well in simulator, but not c[详细]

2023-02-15 10:37 分类：问答
iOS media picker does not show up

I am currently working on an audio application on iPhone. It is based on apple\'s SpeakHere sample code with a user-defined input file from iPod library.[详细]

2023-02-15 01:19 分类：问答
Obj-C error: "expected unqualified-id before class pointer"

I am currently working on a iOS development project. For convenience I split the features in several small programs in early stage. The project consists of Obj-C, Obj-C++ and C++ programs. Right now I[详细]

2023-02-14 23:33 分类：问答