What Is Sampling Frequency?

Sampling frequency can best be described by first taking a look at your favorite Hollywood movie. Even though life happens continuously, movies show us fast chains of still images that our brains interpret as continuous movement. Usually the rate is around 24 frames per second. Sound is also continuous, but it takes a lot more than 24 “frames” of sound per second to sound decent. Although a film camera is taking pictures of people and real objects, audio equipment is taking “pictures” of sound waves. These pictures are called samples, and the most common rate is 44,100 sound samples per second, or 44.1 kHz. You Don't Remember Physics 101? You might remember from a boring day in physics class that different speeds of sound waves produce different pitches. When taking samples of these … [Read more...]