Android 4.4 supports a couple of new Bluetooth features, but one of them will undoubtedly appeal to the cries of OCD sufferers more than the rest: as part of an extension to Bluetooth AVRCP 1.3, Bluetooth audio devices can now directly control Android's system volume. If you use a lot of Bluetooth speakers or headphones, you know how maddening this kind of problem can be. Because your audio output device has its own volume setting independent of your phone or tablet, you're never quite sure how loud things are going to be, or if you'll need to adjust one or the other to get the sound where you want it. It's a needless annoyance, and one that was long overdue for fixing.

It's not the biggest change in the world, but getting rid of this problem is going to please some people, no doubt. Granted, the feature is only available to those devices running Android 4.4 and using Google's Bluedroid Bluetooth stack - many devices run a modified stack - meaning Nexus devices and GPE handsets will get the feature as soon as the KitKat update lands.

Be sure to check out more of our KitKat feature spotlights, we'll be posting them throughout the day!

Android Developers