TAM, on your Win machine, you're using a Web browser. When the firmware is updated in the Air, the Web server in the Air is also updated (as needed). You don't need to update anything on your Win machine.
If you are using the Android client on your tablet, that client may not necessarily get updated. But when it does, you should receive an update notification. You can then update it and you're good to go.
I recommend you update to the latest version if you use it predominantly via Windows. Browsing is now faster. Updates are easy and robust.
You haven't had volume issues because you haven't touched the playback options.
