|All I get from your post is you asking whether or not you can upload audio files, such as ones large like 55MB, on your web server.|
That depends on your web host. They likely have restrictions, so ask them if this applies. Additionally, consider your allowed space and bandwidth, which depends on the web hosting package you sign up with.
There are also a plethora of hosting sites out there that are aimed at specific or wide varieties of media. You might be better off just using their system, depending on exactly what you want to do and the content matter.
Apologies if I don't respond to your reply immediately. I don't check this site daily, but you're welcome to PM me as a reminder.