怎么玩这个NSData？ （缓冲音频）

我想通过缓冲这个NSData来玩：

NSData * audioData = [NSData dataWithBytes:inBuffer->mAudioData length:inBuffer->mAudioDataByteSize * NUM_BUFFERS]; 

音频格式：

  -(void) setupAudioFormat:(AudioStreamBasicDescription *) format { format -> mSampleRate = SAMPLERATE; // format -> mFormatID = kAudioFormatLinearPCM; // format -> mFramesPerPacket = 1; format -> mChannelsPerFrame = 1; // format -> mBytesPerFrame = 2; format -> mBytesPerPacket = 2; format -> mBitsPerChannel = 16; // format -> mReserved = 0; format -> mFormatFlags = kLinearPCMFormatFlagIsBigEndian |kLinearPCMFormatFlagIsSignedInteger | kLinearPCMFormatFlagIsPacked; } 

我的源代码： 从web-socket接收后如何播放音频？