The origins of piobaireachd extend back to at least the late 1500s. The MacCrimmons of Skye are credited with creating the basic ideas and structure of the form. One of the more influential of the MacCrimmons was Donald Mor MacCrimmon.
A-mach variations come after Crunluath Doubling variations, and are pretty tricky! However, let's take a half-hour or so to decode what's going on here... and... you guessed it.... it's really not too hard after all!