Q. Why can’t I play the piano on Shabbat? Didn’t they use instruments in the Temple on Shabbat?
In addition the sages decreed that instruments should not be used because the instruments could well need repairs or tuning on Shabbat (Shulchan Aruch, Orach Chayyim 338).
Even if a non-Jew plays the instrument for us it is regarded as a violation of the spirit of Shabbat rest and of the undertaking of our ancestors to remember the Temple at all times.