5.1 vs 5.2 Surround Sound: What's The Difference?

When researching on the world wide web, you will notice that speakers don't only mean good sound quality, but also, you may find some confusing content when

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

Surround Sound Speaker Setup

5.2.2 Front Height Speaker Placement - Does This Look Right To You?

Wendy Carlos Surround1

5.2.4 vs 7.2.4 and room size question

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

Difference in Dolby 5.1 and 7.2 Surround Sound

5.1 or 7.1: Which sound system is right for you?

Dolby Digital Vs DTS: What's The Difference