Lossy compression algorithms are based on the knowledge of the characteristics of the data to be compressed. Depending on what kind of data, it is possible to pin-point recurring parameters which can be used to carry out the compression.
In purely theoretical disquisitions, often reference is made to ideal conditions that help to simplify things in order to make it more comprehensible. However, one should always bear in mind the physical limits dictated by reality.
Now let's see what this implies in terms of sound itself. As we have already seen in its pertaining section, a sinusoidal signal comprises of one single frequency Pure sinusoid, equal to the number of cycles that the sinusoid itself undergoes per second.
The beginning of the concert is always preceded by a certain tension on everyone's behalf: the musicians for obvious reasons, but also the sound engineers and stage assistants. All is silent, but ready to produce music.
Unlike in a recording studio, at every live event the equipment is set up from scratch (and clearly, dismantled when the gig is over!). So, one by one the various components are positioned
