Bio from drgabba.com:

DR. GABBA is an estranged doctor who briefly worked for KAIZER HEALTH CORP in 1945 and helped invent groundbreaking devices in the emerging school of MUSICAL MEDICINE. However, a dispute about the company’s future with co-founder HENRY J KAIZER led to the banishment of DR. GABBA from all future healthcare services on Earth.

To survive, DR. GABBA experimented on his own body and invented the ACID HEART. The ACID HEART musical medical device uses frequencies produced from music that the user creates.

With this new blood and never-ending life span, DR. GABBA vowed to spend the rest of eternity creating music to fuel his ACID HEART and untimely take revenge on HENRY J KAZIER and the whole KAIZER HEALTH CORP.