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iOS音频系列(三)--AudioQueue - 简书
https://www.jianshu.com/p/5d165bf2233d#:~:text=An%20audio%20queue%20%E6%98%AFiOS%E4%B8%ADplay%E5%92%8Crecord%20audio%E7%9A%84%E5%AF%B9%E8%B1%A1.%E5%BA%95%E5%B1%82%E6%98%AF%20AudioQueueRef%20%E3%80%82%20Audio,recording%20or%20playback%20Audio%20Queue%20Architecture%20Audio%20queue%E7%9A%84%E5%85%B7%E4%BD%93%E7%BB%93%E6%9E%84%E6%9C%89%E4%BB%A5%E4%B8%8B%E5%87%A0%E4%B8%AA%E9%83%A8%E5%88%86%E6%9E%84%E6%88%90%EF%BC%9A
Apple Developer Documentation
https://developer.apple.com/documentation/audiotoolbox/audio_queue_services
In iOS, the audio server has exited, causing the audio queue to become invalid. var k Audio Queue Err _Record Underrun: OSStatus. During recording, data was lost because there was no enqueued buffer to store it in. var k Audio Queue Err _Enqueue During Reset: OSStatus.
ios - Audio Queue Service Example using How to record ...
https://stackoverflow.com/questions/18162471/audio-queue-service-example-using-how-to-record-sound-in-mp3-format-in-iphone
The reason behind this is clearly explained in core audio documentation (page no 51 of core audio pdf). iOS contains the recording codecs listed in Table 2-5. As you can see, neither MP3 nor AAC recording is available. This is due to the high CPU overhead, and consequent battery drain, of these formats.
Echo Cancellation Support in iOS Using AudioQueue
https://stackoverflow.com/questions/46472841/echo-cancellation-support-in-ios-using-audioqueue
Now the problem is to delete echo with the function kAudioUnitSubType_VoiceProcessingIO as suggest in AEC ( Echo Cancellation Support ) in OSX Using AudioQueue. How convert AudioQueue in AudioUnit? I need real code example.
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