This document discusses basic concepts in music technology including sound, pitch, frequency, harmonics, equalization (EQ), oscillators, synthesis, filters, and sound design. It explains that sound is created by pressure disturbances propagating through air. Pitch is defined by the repetition rate of a sound, while frequency refers specifically to the repetition rate of a simple oscillator. Harmonics are the multiple frequencies present in all oscillations that give a sound its tone. EQ is used to boost or cut certain frequency ranges to enhance or modify tones. Synthesis uses oscillators, envelopes, filters, and other tools to design and manipulate sounds from scratch.