frequency domain analysis

• 1. The simplest technological lay-example is the Graphic Equaliser (GEQ) which lets you change how your music sounds by boosting high or low frequencies
• 2.1. If you search for the origins of such study, you may be directed to Fourier's 1822 CE theorem
• 2.2. However, any student of music will be familiar with the notion of harmony in music - Pythagoras' 600 BCE notes on this occur rather late in the history of human cultures. The Rigveda is dated to 1500-1000 BCE, the Hurrian Hymns to 1400 BCE, and bone flutes and ivory instruments ( that have been found and documented ) go back at least as far as 43,000-40,000 BCE
• 3. All of this is tied back to the phainomechanics of humans - how we perceive the world, as our brains process information, and give it internal representations within our processing systems