iphone online audio, multi-channel playback at the same time how to achieve

Player, Audio Queue and Audio Stream File online for playing audio, now two audio while playing a playing background, a broadcast content, and how to achieve it? Official documentation, Audio Queue is hardware decoding, one can only play one audio, but can be set, seems to be using AudioQueueEnqueueBufferWithParameters function, but can not quite understand how to achieve specific ah
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The reply was deleted at 2012-01-04 09:52:27 moderator

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Multi-channel mixer unit type kAudioUnitSubType_MultiChannelMixer, for mixing the plurality of audio streams into a single audio stream.
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This really did not study and learn the next ..