DJ Vitamin D — also known as Derrick Daisey — started his career in 1991 in Los Angeles at the height of the rave scene and has been taking the music scene by.… In October 2008 I was diagnosed with high frequency hearing loss. All caused by not wearing ear plugs and having the volume cranked to “8″ for the last 15+ years. Everything happens for a reason though. I enjoyed my years of djing but now it has to stop. Studio work is also put on hold until my ears heal.