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Music is a collection of coordinated sound or sounds. Making music is the process of putting sounds and tones in an order, often combining them to create a unified composition. People who make music creatively organize sounds for a desired result, like a Beethoven symphony or one of Duke Ellington's jazz songs.

tim·​bre ˈtam-bər ˈtim- : the quality of a sound or musical tone determined by its overtones and different for each voice or instrument.

musical sound, any tone with characteristics such as controlled pitch and timbre. The sounds are produced by instruments in which the periodic vibrations can be controlled by the performer. vibration of a reed.

When something is said in unison, two or more voices sound like one. Unison comes from the Latin root words uni, meaning "one," and sonous, meaning "sound." So unison literally means one sound, and in music, it still retains that meaning. Unison occurs when two or more people play or sing the same pitch or in octaves.

So next time you are listening to a piece of music, try to separate out the parts and listen to how each of the Elements of Music are being used. Listen for the Dynamics, Form, Harmony, Melody, Rhythm, Texture, Timbre and Tonality. You might even want to start keeping a listening journal of the music you hear.

Melody, harmony, rhythm, and form and the expressive elements of dynamics, tempo, and timbre (tone color).

An example of timbre is the tone or color of a voice or an instrument's sound. The timbre of musical instruments, such as a piano playing an A4 note in comparison with a guitar playing the same note, distinguish the difference between the two instruments and how their timbres differ.

Timbre is a quality of a musical sound which is used for differentiating two sounds when they are in the same frequency. Every sound that we hear is dependent on its source. Sound timbre is defined by the characteristic sound waveform, which is dependent on the material through which it is produced.

Sound waves are characterized into three types. Audible sound waves are those that humans can hear. Infrasonic waves are those that are too low-frequency (below 20 Hz) for humans to hear. Ultrasonic sounds waves are those that are too high-frequency (above 20,000 Hz) for humans to hear.

In physics, the sound is defined as. A vibration that propagates as an audible wave of pressure, through a medium such as a gas, liquid or solid. In psychology, the sound is defined as. The reception of sound pressure waves and their perception by the brain.

Homophones are words that sound the same but are different in meaning or spelling. Homographs are spelled the same, but differ in meaning or pronunciation. Homonyms can be either or even both.

The idea of “unity gain” is essentially that when passing audio through a piece of gear, if the output level is the same as when the device is not in the signal path, “unity gain” has been achieved - input equals output, level-wise.