I'm trying to free up space on my iPhone, so I've cut back on a HUGE amount of music (~1000 songs). I went through iTunes and unchecked all of the music I wanted removed and then made sure that I had selected the option to only sync checked music.
However, when I sync my iPhone nothing changes - all the songs are still there. I've tried everything - I have all the music I want gone unchecked in my iTunes library on my computer as well as in the "On My Device" section of iTunes when I plug my phone in. I can't find any solutions to this problem online, you guys are my last hope.
My computer is a MacBook Pro 2011 currently running OSX Yosemite, my phone is an iPhone 5s, and my current version of iTunes is 126.96.36.199.