A blue icon "FFA" appears in the lower right corner of the computer, it seems to be something about audio, all in English. How to turn him off or delete?

Decoder plug-ins, when there is playback software running, some audio and video formats decompression playback, the need to call this decoder, it will automatically load and appear in the lower right corner of the taskbar, when the playback software is closed to exit, it will follow along with the exit, completely automatic, because most of my friends do not understand the reason for this thing, so generally afraid to see this seemingly abnormal, but the usual! This is because most of my friends don't understand the reason for this, so they are generally afraid to see this kind of unusual, but usual thing, so you don't have to care about it, just think of it as a local network connection icon, or a speaker icon.