Multichannel audio can provide immersive environment the listener by rendering surround audio. But such audio resolution takes more effort on recording tracks from multiple microphones for content production. Multichannel audio synthesize significantly reduces the excessive size requirement of the set of signals for transmission medium.
To listen old vinyl LP's in a correct sounding on a sassy with dynamic cartridge you need a circuit, I named it vinyl convertor. You can find this circuit in old amps, but it isn't embedded in home cinema equipment or amplifiers can be obtained nowadays. Also, if you want to archive your vinyl LP's in your computer it is necessary to use this convertor.