Android 9 Pie vs Android 8.0 Oreo Walkthrough: What’s New

Volume Controls Media Output

There are a few neat small changes throughout this version of Android. For one, when you change the volume and see the new side volume toolbar there's an area for "Media". 

Tap this, and you'll see a list of any recent devices you've connected to for media or audio, like Bluetooth speakers. You can tap to instantly connect to a BT device too, without fumbling into the Bluetooth settings menu. It's quickly accessible right from the volume controls. 

Furthermore, you'll see the last few devices you've connected to. And, in developer options, there's an option to connect to 5 Bluetooth devices at a time. In Android Oreo, the limit was two. That's a nice change some will enjoy.