I graduated college and took workshops. But, the major learning came from hands on and working in a studio. Use education and college for a stepping stone and to get you started. The most you will learn is from on the job and finding your own tricks of the trade.
If you want to go into audio for a career, I'd say YES go to college and get some degree. It helps your resume and to get jobs. But, if you just want to learn and do it as a hobby for the moment, college isn't really necessary.
You may want to take a few workshops to get started, but once you get started and know the major points of audio, it's easy to learn on your own.
I would also say find an intern job at a major studio. This is a good second option then college. You will learn and better yet, you will see how studios works and is built. Mabe even get a job...
Marc Mag - If you are just getting started in audio and don't know to much about it, I'd say take some workshops on audio, recording, and mixing. Start with learning analog. Learn about how old analog gear works and how to splice tape. Learn how the human ear hears sound. Know about mics (condenser, dynamic, ribbon). Learn about signal root (line level, mic level, HI Z, Low Z...) Then get into recording and mixing. This will help you better understand the digital audio world.
*Get a college degree ONLY if you know your carrer and this is what you want to do. Don't waste $20,000 for college if this is not a carrer!
*Do, take small workshops to get started. Workshops can be only $200 and you might only have to take 2 or 3 to understand audio to get started.
*Read and watch videos, intern, and learn on your own. Learn your own tricks. You can have all the degrees in the world, but if you don't know how to use them in a studio or learned your own time saving tricks, it's all useless...