问题
I have a number of voice sound streams encoded in PCM (PCM_SIGNED 8000.0 Hz, 16 bit, mono, 2 bytes/frame, little-endian) which I want to send over the network. To save bandwidth I currently encode the streams using JSpeex. However to save even more bandwidth I would like to (if possible) combine these multiple streams into a single stream before encoding with JSpeex. My DSP knowledge is severely lacking & I am wondering how to go about combining the streams in Java?
回答1:
I combine multiple audio streams with this MixingAudioInputStream. The mentioned AudioConcat example uses the same class and it gives you a good idea of how to do the mixing.
You hand it a chosen format and a List of AudioInputStream objects and it mixes them down into one mixed AudioInputStream that you can send back to the clients.
I found it works well provided that your input stream lengths are more or less the same size in length.
来源：https://stackoverflow.com/questions/3373628/combining-multiple-sound-streams-in-java