What is the polytonity?
Polytonality is a compositional technique in music in which the composer uses two or more keys at the same time instead of only one. For example, one player can play in C Major, while another at the same time plays in Elomain. Each key used has a specific tonal center, which is usually the first notes of a key -related scale. By using more than one key, the composer sets up several tonal centers, which theoretically makes music more complicated and interesting for listeners.
Although the musicians tend to classify polyt affection as a contemporary music method, it is based solely on tonal concepts that have existed for hundreds of years. In fact, it is ironically more modern atonal music that leaves the use of tone centers completely, technically cannot be polytonal because the keys are designed or assumed only at best. So it is better to see the technique as a creative way to get modern sound without abanadaring of tonal rules.
Since the polytonity is quite striking, composers only use it when they intentionally want to create a bold impact and give contemporary rotation on traditional tonality. However, the degree of obvious polytonity depends on how closely the selected keys are, because more keys always end in some way, and therefore they are never really independent. For example, if the work used F and the main, the relationship would be the third interval, which is considered a consonant and which is very common. However, if the composer wrote in F Major and B Major, the interval would be widespread or increased fourth, which is a less common, dissonant interval that emerges much more to the ear.
In their early forms, composers such as Wolfgang Amadeus Mozart used, for the comedy effect of polytonity and more. Later, polytonality became a way of composers to emphasize that a certain degree of music chaos couldYet a pleasant larger whole. The idea of these composers was such that it is a dissonance, counterpoint and a "fight" between players or sections that make music interesting. One of the largest composers in this respect was Charles Ives, whose famous "variation on America" is considered a polytonal masterpiece.
Polytonality may not be present in the whole musical work, even if it could be. Probably the simplest example would be players who do the same melody with parallel movement, starting with two different playgrounds. This happens more often when the composer wants to eject at the climax.