The manual says:
Audio input source for recording:
internal mic
L:int R:ext
external stereo
L:int R:balanced (internal mic on Left, external mic on Right from both external pins as balanced audio)
Auto int/ext: camera detects if a mic is plugged in. Int is dual mono, ext is stereo.
Is this working with 600D?
RoBbe
Not on 2.3, you have to wait for 2.4, compile yourself from source or try the nightly build (supporter only).
If you have already donated send a pm to B4rt .