Hi !
I asked this myself sometimes until i discovered that it IS already built in, in a way at least ...

Just use the + and - keys on the remote -> voila !!

But sadly it is not available on the empeg unit ...
We have to rethink the usage ...
maybe use left and right buttons for skipping AND rewinding & fastforward when pressed long, using up and down for volume, and if pressed simulteanously going to the menu ...
That would be MY choice ... any supporters ? :)

Nils