Hey all!
As I'm currently retrofitting a few Sony MDR-7506 headphones with the Remote Audio Headset Cable, here's the rather unusual pinout for the TA5 connector Remote Audio use on their headsets and headset cables:
1 – Headphone Right
2 – Headphone Left
3 – Headphone Common
4 – Microphone Ground
5 – Microphone Audio (and 5V, if chosen)
Cheers,
Jürg