Cycle of simple short articles about audio digital signal processing. Intended these who interesting audio, but haven't special education.
After reading these articles you get base of knowledge about theory audio digital signal processing. If you musician or doctor medicine or broker or housewife or anybody who like music - safely begin to read and watch these free educational stuff and video stuff.
All questions you can ask here...
Audio Converter Simple Theory by Yuri Korzunov
What is Audio Spectrum. Simple Theory by Yuri Korzunov