At first glance, it might seem like your iPhone has just one volume control that you can change with the volume buttons at the side of the handset, but there are actually nine different volume controls present on your handset.
It can be challenging to discern which volume control you’re adjusting when you press your device’s volume buttons, and so iOS developer midkin just launched a new jailbreak tweak called SmartVolumeMixer to make life a bit easier in this department.