Audio Crossfade with Multiple Ins

Hi all,
is there a n object or already available elegant solution to do this:

Have multiple audio signals (let's say 8) and connect them to an object that then gives you a float control, so that you can fade through the 8 (or however many) inputs; so that e.g. "0.0" would mean only channel 1 whereas "1.0" would be only channel 8.
Basically like selector~ but with fading.

Thanks, Frank