Sound is produced when energy, in a solid, liquid, or gas, causes oscillations (vibrations or tremors) to propagate through a medium, the resulting changes in air pressure then being understood as sound by the receiving organ (for example, the ear). Sound therefore requires vibration (mechanical waves) through a solid, liquid, or gas to reach us.
In physics, sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid, or solid." In human physiology and psychology, sound is the reception of such waves and their perception by the brain". Music theory analyzes sound from both an auditory and scientific level.
One key difference between audio and music is that music is typically intentional. When someone creates music, they are intentionally organizing sounds in a specific way to create a musical composition. On the other hand, audio can be intentional or unintentional. For example, a person speaking is creating intentional audio, while a bird singing is creating unintentional audio.
Another key difference between audio and music is that music is typically organized in a way that is pleasing to the listener. This can be done through the use of melody, harmony, rhythm, and timbre. While audio can also be pleasing to the listener, it is not necessarily organized in a way that is specifically designed to be musical.
Overall, audio and music are both forms of sound, but they differ in their definition and how they are typically used. Audio is considered anything that can be heard while music is specifically organized sounds designed to be pleasing to the listener.