resources for learning Web audio API

I get this might not be your standard "Post code, help me debug it" question but I feel like I am at the end of the line and I thought I might as well try and get input from your guys before giving up.

For two days now I've been trying to wrap my head around the Web-Audio-API, which, as far as I am concerned is a fancy name for "objects and functions that help you process sound in Javascript".

A few things that I wished to do were simple like: record user mic and tell him the volume on a random scale, get a song file from the user/from the server and add effects to it... etc

However, the few tutorials and books I found on the Web Audio API will soon turn to open-source libraries to do stuff. I understand that sometimes it is useful to use these type of resources, but I feel like I'm learning nothing if a big part of the process is "Now use these 200 lines of code that I don't understand and you don't understand but I swear to god they will load a .wav file in such a way that you will be able to process it in a node inside the audioContext".

So, my question is, are there any resources/books/tutorials/w.e for a newby "programmers" that "teach" the web audio API from 0 without using "outside" resources/frameworks... etc.