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Route audio signal on a RIoTboard with KitKat

Question asked by Xavier on Jan 28, 2015
Latest reply on Feb 2, 2015 by Xavier

Hi! I'm facing an annoying problem. I'm currently using a RIoTboard (Android KitKat) with speakers connected to the audio output and a screen (built-in speakers) connected to the HDMI output. I want to route audio signals the following ways:

 

- Same signal towards all the speakers

- One signal towards the speakers and another one towards the screen

 

Because of all the abstraction layers, I can't find any solution. Here's what I was looking into:

 

- Using NDK

- Using AudioManager class and its awfully undocumented setParameters method

- "hacking" Android way of managing audio streams by using streams differently (e.g. music -> alarm stream)

 

Any clues?

 

Thanks in advance!

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