I preface with the acknowledgement that I have ZERO musical ability ... I can't read music, I evidently have no ear for it (when I think something sounds good ... tonal wise ... musical friends say I'm crazy), I can play no instrument, and if I'm singing I keep it low. With that out of the way ...
The organ is called the King of Instruments for a reason. That term is reserved by some for the pipe organ (the sound is produced by wind passing through the pipes), but today the electric / digital organs with good speakers can be impressive, and most can't tell the difference.
I had trouble deciding which saved organ clip to share. This young organist (he's starting his second year as a music major at Brigham Young University, he is LDS) visits organ lofts, and rather than play a piece he demonstrates the qualities and abilities of the particular organ. Below are two clips from Catholic churches. It is great to see a young person develop an interest in the noble instrument. I also pray this his playing in the presence of the Blessed Sacrament may expose him to graces that someday he may not be able to resist.