Music: toggle to stereo output to all speakers with keyboard hotkey

[lotust7]

Is there a possibility to toggle with a keyboard key the output of music to:

Output stereo to all speakers.


Background:
If I play just 2 channel music my 5.1 home cinema setup does not use sub ( LFE) and back speakers.
and it is boring to aways goto the audio settings an switch manually

Thanks in advance