Back to Electronic Music
        DJ  --  is a man who has  got a definite collection of music, who can make use of techniques to play this music; who makes up a program of music people dance or listen to. The are of DJ is to make up a program and to play it in such a way that people move all the time and enjoy themselves.
        Hi! In the last issue I explained how to install the apparatus, DJ works at, well, this information is absolutely useless. So, fix and place apparatus however you like. The necessary information awaits ahead.
Would you like to leasnt it ? Come on! Never eat pancakes, pizza and everything got while working, or wash your hands before you touch the record, which should be taken either by the edge or by the apple. I  hope you know why.
        For people to dance all the time, the music shouldn't stop. It is easy to achieve. Put the first record.  Then put the second one above the first with the help of a remote control; then switch off the first, put the third on the second, and so on and so forth. For people not to notice the whole process, you should select records and regulate the same speed of compositions with the help of the handle 'pith' on the rotator. During the mix the records should 'beat' together ( my forehead is sweating, so hard I try to remember all this, because my ears and hands see to it, and my brains are occupies with absoluting different
things) at the same speed. The speed is measured in BPM the number of beats a minute (do not mix with the speed of recording - 33rev/min - 45rev/min).
Music should be played the way it is recorded. And it is composed at computer and has got one measure: 4x4, i. e. 4 times by 4 beats of a beat. It is called square; It is formed the following way; you take the part of percussion instrument as a base, cycle it and add bass and other sounds to make it cool!
Not only the speed of both the records should be set together, but the squares of two (or three) records should be matched as well. Before switching on the next record, honey, you should match the beginning of squares beginning with a strong sound. The record can start with a weak on, that's why place the sound in its place.
Homework:
        While listening to music, try to determine and single out a square in a song. To practice, learn to find the first beat, the beginning. Take two records, and try to start the second one matching the squares.
That's all. I am going to have a shower. I am really hot. As for you, finish your pancake, wash your hands and start your homework. See you !
 
 Any musical composition consist of blacks (so-called parts samples). These blacks, while repeating and changing in content, create a song or any other musical from. The measure of the parts is usually
with drawn in time. The duration of time between beats sets the tempo of a composition, which  is
practically the same all through this  composition. Some syles do not keep to the 4/4 measure. The reason will be explained later.
        So, let's try to imagine the outlook of any composition on a diagram. A straight line on the diagram below is a composition itself, and dots "A" and "B" - its beginning and end accordingly.

The segment of the diagram are parts have described  earlier. In our example the number of parts is not big,but there can be quite a lot of them, in reality.
    So let's begin from the very beginning. Segments 1-3 represent clear drum beats. From the 3rd
square the part of the grand piano can join and go on till the 7th square.
In the 5th or 6th part the violoncello may join and so on, and so forth. The part which can't keep to the measure 4/4, "occupies" two parts and, accordingly, keep to the measure 8/4. But as both the measures have got a quarter denominator , they easily match each other. In the 7th  square we have got blank playing, which is followed (8th part) by vocal, and from the 10th part the vocal may be kept up by the flute. Thus, it is not difficult to understand principles of organizing any composition/ Even if the beat base of the composition is not heard, the measure of it is sure to be present. It is easily checked up: beat time of a song, stamping your feet and counting: one-two-three-four, one-two-three-four . . . .If you are very observant, you will see, that the appearance of new sounds and parts comes with the 1st time and corresponds to the beginning of a new part.
If analyse music of a particular style or tendency, it' won't be difficult to notice that different musical compositions of the same style or tendency have got the same structure. If you realize this structure quite well, you may easily foretell the development of the theme of any composition. Just thanks to this, many professional D.J.s can use unfamiliar material in their work. Having an idea of the structure of musical compositions, they can match them easily and switch from one to the other quite smoothly. To do so you will need:
1. To match the composition in tempo with the help of a special tempo regulator, placed on D.J's equipment.
2. To start compositions synchronously, matching the beginning of 'squares'.

 It is not so important what square compositions will be started synchronously with. It is the coincidence of square beginnings that is very important. The following diagram illustrates this quite well.
In the diagram the beginning of the 2nd composition (dot "C") is synchronously started in the 9th square of the first composition, so four squares of the 1st composition (9-12) and four squares of the 2nd composition (1-4) sound together. To match sounds of two sound sources, CD-players or vinylus records-players have got a special device of matching sounds-mixer.
There are several ways of combining compositions. We only show most frequently used ones. (so-called type of 'gluing' ) or
or

To make a ' gluing' less noticeable, D.J.s substitute the timbre of one composition by the timbre of the other.
Starting composition synchronously in dot 'B+', with a remote control reduce bass and
smoothly increase the volume of the composition "B" smoothly or abruptly and simultaneously reduce  in the composition 'A'. After completing (dot '3') educe smoothly the volume of the composition 'A'.
With the help of this manipulation we achieve smooth substitution of one beat base by the other. This  technique is applied not only to bass, but also to medium and high frequencies. The following
examples of correspondence of frequencies and scores will make the above point more clear:
Bass-  percussion beat, bass guitar;
MF -- vocal, the majority of timbres.
HF- top part of a woman's vocal, drum. The technique of mixing of most styles is the same, but
there are some peculiarities.
The main rules:
1. Match exactly the tempo of both the compositions;
2. Synchronize exactly the start of the second composition in respect to the 1st one;
3. Calculate frequencies substitution the right way.