Inspired by something SackJo22 said I gathered samples from one mixter/upload in each year that ccMixter has been in existence. I didn’t have any particular criteria in mind as I selected samples, except that I took one from October of each year (except 2004, the samples in October that year weren’t a file type that I could open so I went to November).

There are actually eleven sample sources in the ten year span since I used one from the beginning:

2004 Wired Magazine CD - guitar, fx
2005 ghost - guitar
2006 norelpref - guitar
2007 rokzroom - synth
2008 onalberto - synth
2009 CarbonMonoxideMusic - drum hits
2010 gurdonark - synth
2011 Jeris - beats, bass, flute
2012 Coruscate - vocals
2013 leinadsorihcak - beats
2014 debbizo - guitar

Many thanks to all.