Here are some articles that will expand your understanding of sound and music production.
These 10 hints of advice are actually pretty good. They Lay out some pretty advanced ideas in concise bullet format.
Compression can be a challenging subject to understand. This article is a little advanced but nonetheless useful.
Getting your songs loud without distorting their character is a never ending battle. This article talks about “loudness” in scientific terms relevant to audio engineers.
EQ is another vital aspect to mixing and mastering. This article gives some good insight into getting started with the EQ process.
Headroom: What is it? Why does it matter.
The physics of sound.
Essential read on song structure.
Perfect visual representation of the overtone series.