No I do not want them to pretend they are singing .
That is not necessary at all , when a singer works
with a band on tape he does not pretend to play
the music .
So why should the musician pretend to sing ?

Take a look at the video's on You Tube made by Sud Clavier
where the Tyros 5 is demonstrated by 2 musicians .
In one of these video's there is a female singer on the
Audio Recorder .
I think the Audio to Multi Pad link makes it more easy .