ive always done such, since i dislike how -ic becomes more like -ick sound, yet things like magician/musician don't have that sound, as such i spell it how i hear it
its a preference, and i don't ascribe myself to standard spelling when it does not agree with the sound
though often i spell it musick, the origin for my 'fix' on the spelling is like from 'quick', which would be odd to be 'quic' ('quik' retains the sound better), and i shorten it to musik because that retains the -ick sound better in my opinion
-ic makes more sense as the -ice sound, music to me should sound like musice based on how its spelled
it may be based on my french background that i consider 'c' more like a 's' than a 'k'