Wondering if a machine could be said to be 100% efficient

[Rinnn62]

I was just wondering if a machine could be said to be 100% efficient if for example it gave out heat, light and sound but all I these types of energy are wanted and not wasted?
Thanks for the replies

 

[mfb]

If you want every output: Sure. Electric heating is basically 100% efficient, for example.
Add tiny amounts of gravitational waves, if there are moving parts ;).