小编Pes*_*lly的帖子

我一直试图在iOS 9上的应用程序间音频会话期间录制我的输入.扬声器输出听起来很好,但录制的文件有节奏的咔嗒声.波形如下所示......

我已经调整了我能想到的每个设置和参数,似乎没有任何工作.

以下是格式设置(流设置相同)...

    AudioStreamBasicDescription fileFormat;
fileFormat.mSampleRate          = kSessionSampleRate;
fileFormat.mFormatID            = kAudioFormatLinearPCM;
fileFormat.mFormatFlags         = kAudioFormatFlagsNativeFloatPacked;
fileFormat.mFramesPerPacket     = 1;
fileFormat.mChannelsPerFrame    = 1;
fileFormat.mBitsPerChannel      = 32;       //tone is correct but there is still pops
fileFormat.mBytesPerPacket      = sizeof(Float32);
fileFormat.mBytesPerFrame       = sizeof(Float32);

这是流设置......

        //connect instrument to output
AudioComponentDescription componentDescription = unit.componentDescription;
AudioComponent inputComponent = AudioComponentFindNext(NULL, &componentDescription);
OSStatus status = AudioComponentInstanceNew(inputComponent, &_instrumentUnit);
NSLog(@"%d",status);
AudioUnitElement instrumentOutputBus = 0;
AudioUnitElement ioUnitInputElement = 0;

    //connect instrument unit to remoteIO output's input bus
AudioUnitConnection connection;
connection.sourceAudioUnit = _instrumentUnit;
connection.sourceOutputNumber …

叫做结肠的这种用法是什么？

以下代码摘自Learn Core Audio一书.

    int main(int argc, const char * argv[])
    {
    //...

    cleanup:
        AudioQueueDispose(queue, true);
        AudioFileClose(player.playbackFile);

        return 0;
    }