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Amp+ and libao

Hi,

 

I have a raspberry pi model A (rev 2) running the latest jessie OS with the Amp+ and have followed the setup instructions on this site to configure it as the default audio device. Aplay -l indicates that the amp is indeed the default (and only) audio device, and I can successfully play wav files through the amp using aplay.  However, I have written an mp3 player in C using libmpg123 and libao but when calling the libao function "ao_default_driver_id()" it returns a negative number, which according to the libao documentation means that there is no audio hardware available.

 

I'm stumped - any help would be appreciated!

 

Many thanks,

Mike

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