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 AV Receivers - Functionality .

Put simply, a receiver has two main functions: firstly, it amplifies the sound so it can be fed to your speakers, and secondly, it allows you to select the audio and video you wish to watch. You can use it to switch from a DVD to free-to-air TV, for example, with the touch of a single button.

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Signal amplification
One of the most important functions of a receiver is signal amplification. The receiver is receiving a signal from a source (player, TV, or other sources). If it is digital, the receiver first converts it to analog and then amplifies it to increase the volume or adjust the level of frequencies (high, middle, low).

Video switching
The receiver combines all the video signals from multiple sources into one, freeing your room from the web of wires and easily managing all available video sources.

Audio decoding
All modern DVD and Blu-Ray discs have a multichannel recording, that is, for each speaker, there is its soundtrack with certain content and volume. The parameters of each audio track are recorded on the disc as codes. To get exactly the sound that is recorded on the disc, the receiver must correctly decode the information, and for this, it is equipped with special decoders.
Modern receivers can handle high definition formats Dolby Digital Plus, Dolby TrueHD, DTS-HD Master Audio, and uncompressed PCM signal.

DSP Modes
Some AV receiver models are equipped with DSP digital audio processing. This allows you to add special effects to the sound – like being in a stadium, etc.

The multi-room function is the ability of the receiver to play music in several rooms at once in your house. Moreover, depending on the model of the receiver, not only audio but also video signal can be redirected to the next room.

Automatic sound tuning
Many modern receivers are equipped with an auto-calibration function or automatic adjustment of sound parameters. The main purpose of such adjustment is to adjust the optimal sound volume, time delays in different channels and create the most comfortable sound tone.

Video enhancement functions
Some receivers have an upscaling function that can convert video to a higher quality format. Latest generation receivers upscale video resolution up to 4K.

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