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The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium. More simply, the speed of sound is how fast vibrations travel. At 20 °C (68 °F), the speed of sound in air, is about 343 m/s (1,125 ft/s; 1,235 km/h; 767 mph; 667 kn), or 1 km in 2.91 s or one mile in 4.69 s.
In music, the dynamics of a piece are the variation in loudness between notes or phrases. Dynamics are indicated by specific musical notation , often in some detail. However, dynamics markings require interpretation by the performer depending on the musical context: a specific marking may correspond to a different volume between pieces or even ...
[12] Regarding the climactic section of the title track, Pope wrote: "It should be obvious to anyone with a reasonably developed ear that he is working through some extremely complex melodic material here, stopping and starting, increasing the speed, and eventually shifting into a gear that most of us will never know. I believe that we are ...
Acoustic theory is a scientific field that relates to the description of sound waves.It derives from fluid dynamics.See acoustics for the engineering approach.. For sound waves of any magnitude of a disturbance in velocity, pressure, and density we have
The first example of adaptive music is generally said to have been in Space Invaders by Taito in 1978. The game's simple background music, a four-note ostinato which repeats continuously throughout gameplay, increases in tempo as time goes on and the aliens descend upon the player. [3]
The crest factor, which is the difference between the signal's peak and its average power, [31] is on occasions considered as a basis for the measure of micro-dynamics, for instance in the TT Dynamic Range Meter plug-in. [32] Finally, R 128 LRA has been repeatedly considered as a measure of macro-dynamics or dynamics in the musical sense.
Pitch scaling is the opposite: the process of changing the pitch without affecting the speed. Pitch shift is pitch scaling implemented in an effects unit and intended for live performance. Pitch control is a simpler process which affects pitch and speed simultaneously by slowing down or speeding up a recording.
Gradation is gradual change within one parameter, or an overlapping of two blocks of sound. Meyer lists melody, rhythm, timbre, harmony, "and the like" [12] as principal elements of music, while Narmour lists melody, harmony, rhythm, dynamics, tessitura, timbre, tempo, meter, texture, "and perhaps others". [13]