Pitch bug on Clip+?

I have read quite a lot of this thread and found it mostly interesting and certainly entertaining. I was intriqued with the idea that the Clip+ might be more efficient with 48khz files and made some test files and started by comparing 44.1 khz files and discovered that my unit played a 322 second file to within one half second of my computer - allowing for lag time with me pressing buttons and/or devices starting, pretty much identical… Given that I am not blessed (or cursed) with perfect hearing and/or pitch (I struggled in high school band), I can muddle through with my limitations and enjoy my $50 music player.