Is a home-cinema, for what that used and which is its interest?

The recording of a music is all the more perfect as it restores this one accurately, with the possible minimum of additions. It is a question of hearing the voice of the artist or the instrument which accompanies it in their purest form, as if they were in the part with you.

With the cinema, on the contrary, each sound that you perceive is an artifice. Nobody forever on the occasion to record the crash of an airliner which breaks into two, nor the howling of a tyrannosaure. These sound effects that one hears with the projection of a film are only supposed approximations to reinforce the cinematographic experiment of the spectator by convincing sounds which impress it.

In fact, all the sounds appearing in the original soundtrack of a film are generated after turning. The dialogues are recorded in studio and the music added thereafter, as well as the sound effects coming from a range of audio sources, sometimes unusual. The “biological” sounds, like the noise of the whales for example, are used to reinforce the basic effects in the noises of explosion. The decisions relating to the sounds and the adjustments of the band are made by the sound designer. This one must take into account a crucial factor - the dialogues, which it is constrained to preserve. Indeed, the realizer of film is there to take care of the clearness of the dialogues and does not hesitate to sanction any unusual sound effect.

This distinction is very important, because it helps us with better including/understanding the operation of a home-cinema compared to the loudspeakers mp3 iPod. Contrary to the systems hi-fi, like the station of reception iPod, the principal function of the home-cinema is not to reflect reality, but to recreate it. With this intention, the best systems must be able to give the impression to the house than one is in fact with the cinema.

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