如何将效果应用于麦克风输入？（iOS Core Audio＆Audio Graph）
我想开发iOS5上的应用程序，它可以获得语音和应用效果（高通滤波器，延迟等）并从扬声器输出。
我尝试了RemoteIO（输入） – >效果 – > RemoteIO（输出），但它没有用。
AudioComponentDescription cd; cd.componentType = kAudioUnitType_Output; cd.componentSubType = kAudioUnitSubType_RemoteIO; cd.componentManufacturer = kAudioUnitManufacturer_Apple; cd.componentFlags = 0; cd.componentFlagsMask = 0; AUGraphAddNode(self.auGraph, &cd, &remoteIONode); AUGraphNodeInfo(self.auGraph, remoteIONode, NULL, &remoteIOUnit); UInt32 flag = 1; AudioUnitSetProperty(remoteIOUnit, kAudioOutputUnitProperty_EnableIO, kAudioUnitScope_Input, 1, &flag, sizeof(flag)); AudioStreamBasicDescription audioFormat = [self auCanonicalASBDSampleRate:44100.0 channel:1]; AudioUnitSetProperty(remoteIOUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output, 1, &audioFormat, sizeof(AudioStreamBasicDescription)); AudioUnitSetProperty(remoteIOUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &audioFormat, sizeof(AudioStreamBasicDescription)); AudioComponentDescription cd_e; cd_e.componentSubType = kAudioUnitSubType_LowPassFilter; cd_e.componentSubType = kAudioUnitSubType_Reverb2; cd_e.componentFlags = 0; cd_e.componentFlagsMask = 0; cd_e.componentManufacturer = kAudioUnitManufacturer_Apple; AUGraphAddNode(self.auGraph, &cd_e, &effectNode); AUGraphNodeInfo(self.auGraph, effectNode, NULL, &effectUnit); AudioUnitSetProperty(effectUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Global, 0, &audioFormat, sizeof(AudioStreamBasicDescription)); AudioUnitSetParameter(effectUnit, kAudioUnitScope_Global, 0, kLowPassParam_CutoffFrequency, 10.f, 0); AudioUnitSetParameter(effectUnit, kAudioUnitScope_Global, 0, kLowPassParam_Resonance, 10, 0); AUGraphConnectNodeInput(self.auGraph, remoteIONode, 1, effectNode, 0); AUGraphConnectNodeInput(self.auGraph, effectNode, 0, remoteIONode, 0); AUGraphInitialize(localGraph); 但如果AUGraphConnectNodeInput设置如下，我听到了扬声器的声音。
AUGraphConnectNodeInput(self.auGraph, remoteIONode, 1, remoteIONode, 0);
我该怎么做？
我写了一篇教程，详细介绍了如何从iOS上的麦克风进行实时处理和录音 ，但从那时起，我发现了novocaine的乐趣，这是一种在iOS上进行效果处理的更简单方法。 这比处理AURemoteGraph和那些东西要容易得多。