How to make a good home cinema or home theater system, the history and technique of realistic audio and video effects.
How to create a home cinema system
In recent years, the need for faithful reproduction has grown, as well as music and video, and this has led to a widespread diffusion of home-theater systems in the home, also called home cinema.
In the beginning, when DVD players still did not exist, there was talk of Dolby surround realized by means of a logic processor that processed the two stereo audio tracks coming from a stereo VHS hi-fi video recorder.
By means of this technique, rear audio effects were created from small speakers located in the room on the sides near the back wall and the effects of strong bass enhancement by means of a subwoofer positioned on the floor in front of or behind the viewing point. I listen.
Three additional channels were then created in addition to the original ones. With the start of dvd players, we have moved on to dolby digital which consists in having more audio channels at the start, that is, already recorded on the dvd.
Currently the most popular scheme is the 5 + 1, which consists of two front channels, a central channel, two rear channels and a sub woofer respectively.
The 5 indicates five channels for five speakers capable of faithfully reproducing the entire audible sound spectrum while the 1 indicates the sub woofer or a particular speaker dedicated exclusively to very low frequencies.
It is possible to test the system using the so-called pink noise which represents a test signal which is alternately reproduced by each loudspeaker to obtain an optimal volume adjustment that must be the same on all speakers.
To create a basic home theater system you need a DVD player, a 5 + 1 multichannel amplifier, 5 loudspeakers at least two-way speakers.
To view the images, the choice can fall on a 16: 9 LCD or plasma TV or on a television projector.
Before proceeding with the purchase, to avoid disappointment, it will be necessary to establish the amount of money to spend and the room where to install the system which will determine the size of the screen and the power of the audio system.
