I am building a (hopefully) cool hardware accessory for the 770.

I do not want to divuldge more at the moment, but with a little luck there will be pictures in the accessories section soon.

The problem for me is that plugging something into the headphone socket cuts off the internal speaker. I know that this is typical operation, and is often simply controlled by the jack circuitry.

Howerver, I also noticed that when I plug my headphones into the 770 when it is asleep, it wakes up. This indicates that the OS is aware of the headphone connection. Indicating that possibly, the muting of the internal speaker is under software control.

My question is can I over ride this? Can I have the internal speaker active even when something is plugged into the headphone jack? Can I select speaker/jack/both under software control?

Is there a mixer?

It would be great if I could just echo "<something>" >> /proc/<something> and have the internal speaker work, even with something plugged into the headphone jack.

Any help appreciated.