[Mp4-tech] [Audio] About AAC Audio Streaming

[Li Zhengming]

Dear all,
I'm testing streaming mp4 with aac audio now. I encode a two-channel wav file into
an aac file with ADTS header. Then I try to listen to this aac file with some aac
decoders, it's ok and both two channels are present. But when I create a mp4 file
with this aac file using mp4creator60 of the MPEG4IP project, and stream it with
Darwin Server, the player can only give me the left channel. I have tried many
files with two channels, and the results are the same.
Then I extract the right channel from the audio file, and encode it into an aac
file, and then create a mp4 file from it. Then while streaming with Darwin Server
it works! The audio seems perfect, except that the volume is somewhat little. 
What's the reason of this? Is it due to the fact that streaming two-channel aac is
not allowed, or that some operations in my process are wrong?
Thank you all for your kind responses!
Li Zhengming