I don't think we will ever come in contact with any of them. Like you said, it would take huge amount of time for them to get here, assuming they have the technology to travel at speed of light in vacuum.
As for their musical ability, I'm not sure if they even will use sound as music. I mean we use sounds because we have air, but in outerspace, they might not have air and therefore sound will not propagate. Imagine aliens were evolved to "hear" with lights instead! like, they have a diffraction grating that will analyse the incoming light to make it a music inside their heads or something. Whoa, that'll be insanely cool!.
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