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我有一個AUGraph播放和錄製音頻,這樣設置:AUGraph三維混合機噼啪
RemoteIO -> -> RemoteIO
Mulichannel Mixer -> 3D Mixer
Read Callback -> -> Write Callback
我的問題是,我在記錄的聲音裂紋。沒有3D混音器 聲音很好。但我需要他調整Playbackrate ...
音頻格式:
memset(&_audioFormat, 0, sizeof(_audioFormat));
size_t bytesPerSample = sizeof (UInt16);
_audioFormat.mFormatID = kAudioFormatLinearPCM;
_audioFormat.mFormatFlags = kAudioFormatFlagsCanonical;
_audioFormat.mBytesPerPacket = bytesPerSample;
_audioFormat.mFramesPerPacket = 1;
_audioFormat.mBytesPerFrame = bytesPerSample;
_audioFormat.mChannelsPerFrame = 1;
_audioFormat.mBitsPerChannel = 8 * bytesPerSample;
_audioFormat.mSampleRate = 22100.0f;
我不知道爲什麼3D混音器增加了裂紋-.- 這裏是一個小樣本音頻:Click
希望有足夠的信息來找到解決方案。 謝謝:)
一些額外的信息:
隨着裂紋
AudioUnitGraph 0x7F8000:
Member Nodes:
node 1: 'auou' 'rioc' 'appl', instance 0x1cd66d40 O I
node 2: 'aumx' 'mcmx' 'appl', instance 0x1e055b40 O I
node 3: 'aumx' '3dem' 'appl', instance 0x1e05e7a0 O I
Connections:
node 1 bus 1 => node 2 bus 1 [ 1 ch, 22000 Hz, 'lpcm' (0x0000000C) 16-bit little-endian signed integer]
node 2 bus 0 => node 3 bus 0 [ 1 ch, 22000 Hz, 'lpcm' (0x0000000C) 16-bit little-endian signed integer]
node 3 bus 0 => node 1 bus 0 [ 2 ch, 44100 Hz, 'lpcm' (0x00000C2C) 8.24-bit little-endian signed integer, deinterleaved]
Input Callbacks:
{0x12d9c1, 0x1cd65f30} => node 2 bus 0 [1 ch, 22000 Hz]
CurrentState:
mLastUpdateError=0, eventsToProcess=F, isRunning=F
無裂紋
AudioUnitGraph 0x7E7000:
Member Nodes:
node 1: 'auou' 'rioc' 'appl', instance 0x1e888810 O I
node 2: 'aumx' 'mcmx' 'appl', instance 0x1e88a0e0 O I
node 3: 'aumx' '3dem' 'appl', instance 0x1e88b200 O
Connections:
node 1 bus 1 => node 2 bus 1 [ 1 ch, 22000 Hz, 'lpcm' (0x0000000C) 16-bit little-endian signed integer]
node 2 bus 0 => node 1 bus 0 [ 1 ch, 22000 Hz, 'lpcm' (0x0000000C) 16-bit little-endian signed integer]
Input Callbacks:
{0x1469b9, 0x1d5bffa0} => node 2 bus 0 [1 ch, 22000 Hz]
CurrentState:
mLastUpdateError=0, eventsToProcess=F, isRunning=F
更新:
我認爲只有在AudioGraph重新啓動後纔會出現問題。
1.) CheckError(AUGraphStart(self.graph), "Error starting graph. - error code");
2.) Recording <- NO CRACKLE!
3.) CheckError(AUGraphStop(self.graph), "Error stopping graph. - error code");
4.) CheckError(AUGraphStart(self.graph), "Error starting graph. - error code");
5.) Recording <- CRACKLE!