Hi,
On Fri, Sep 19, 2014 at 3:33 PM, Dr. H. Nikolaus Schaller hns@goldelico.com wrote:
Hi, for evaluating if we should or should not finally consider the TWL6040 for the Pyra audio system, I became aware that the PandaBoard ES (also comes with the TWL6040) is capable to connect a single external speaker and drive it with up to 1.5Watts:
http://e2e.ti.com/support/omap/f/849/t/258083.aspx
So it would be possible to connect the speakers planned for the Pyra and play sounds (the OMAP5432EVM has no access to this amplifier).
I have the GTA04-3.17 Linux running on the Panda ES as well (so we have exactly the same setup as for the OMAP5432EVM except the device tree).
aplayer does something (without complaining). But I don't get sound.
Most likely the amixer settings are not ok (muted).
So you've hit another thing I hate about TWL6040 - it has like a hundred of ALSA controls and is extremely difficult to use as a result.
...
So does anyone know a pointer to a simple (command line) setup for the PandaBoard to get sound on the headset jack and the speaker interface (J6) of the PandaBoard ES?
Most likely it should be the same for OMAP5.
I don't have a PandaBoard, but here's working script for OMAP5 with 3.8 kernel attached, if that helps.
Still it has problems even with that (besides poor quality), like still outputting audio with volume slider set to lowest setting, but at least it works for me.