7.1 or 5.1 Surround Sound

STR-AN1000/TA-AN1000, Help Guide

What's the difference between surround sound 5.1 and 7.1 and which should I choose for movie watching? - Quora

What Is Surround Sound? 5.1, 7.1, Dolby Atmos, and More Explained

For 5.1.2, Dolby recommends placing the surround speakers behind the listening position. Why? Wouldn't it be better to have them next to the listening position as recommended in a 7.1 setup?

5.1 Vs 7.1 Surround Sound - Which is Right for You? - ElectronicsHub

Going to 7.1-Channel Surround Sound

Signature Surround Sound Home Theater 7.1 Channel Speaker System

5.1 vs 7.1: Surround Sound Explained and Examine for Home Theater?

Surround Sound Channel Numbers Explained: 2.1, 3.1, 5.1, 7.1, etc.

Surround sound - Wikipedia

Do I Need a 5.1 Surround Sound System for My Computer?

5.1 Surround vs 6.1 Surround vs 7.1 Surround Sound Speaker Setup

Upgrade to 7.1 Surround Sound for an Immersive Home Theater Experience

Types of Surround Sound Systems - 5.1, 7.1, 9.1 channel, Dolby Atmos, and DTS:X