The sound of the drum is quite dry as cymbals are used softly in the background; also, the drummer use all the different toms. The drums perfectly fit the organ loop as they are playing the same kind of rhythm (the first shots are on the beat but during the second measure they nearly are all off the beat) and the drummer even adds to the driving feeling of the beginning (by using all of the toms he creates variation on the sound which are totally unexpected but also quite soft). .
Next, the guitar joins in. The guitarist is retaining his sounds by holding the strings in a way that make the guitar sound kind of shy. This third element has two effects on the beginning of the piece; first it helps building this driving feeling since the texture makes us feel something is about to happen. Also it gives a little more structure as the second beat is accentuated with the guitarist emphasizing the sound. .
At the beginning of the 17th measure, the fourth and last instrument finally joins in. The trumpet players (he seems to use a shell because the sounds are quite short and specific) begins to play the given melody, accompanied by the right hand of the organ player (whereas his left hand is used to play the bass loop, the drummer and the guitarist keep on playing the rhythmic part). The whole band plays the given melody for a couple of measures, and we finally reach the end of the introduction with the all band playing together. Une minute de passé.
The first part of the tune begins with an organ solo that will last about 2 minutes and half. At the beginning of the solo, the rhythmic section (guitar, organ left-hand, and drums) mainly keeps on playing the steady pattern it had reached at the end of the introduction. The organ solo is specific compared to other instrument because of the instrument itself; as we said in the beginning, the very beginning and very end of each notes played on an organ are flat (I mean no sharp attack nor sustain and decay).