How can I hear Music with A Headphone

[arne anka]

> No do you know a link by Openmoko where I can search!

have a look at the connector schema at
http://wiki.openmoko.org/wiki/Neo_FreeRunner_GTA02_Hardware
ring
1(base): GND
2: right out
3: left out
4(tip): mic + HOLD-button(press:short to GND)

> When I deactivate "Right Mixer Right Playback Swit the do not work the  
> right
> Headphone speaker but where is this option for the left speaker?

i assume your adaptor does only feed the right one.