The Obsidian V3 soundboard carries one sound font at a time.
The Obsidian V4 soundboard carries up to 8 sound fonts at a time. With this board you can switch between each font(say a Darth Maul font, or a Yoda font) on the fly.
Each font has banks that hold the various saber sounds such as: clash sounds, swing, hum, power on ect.
You use the obsidian launcher to pull together a font you'd like to use on your saber. You can have different fonts saved on your PC. With the launcher, you open the saved files and use whatever individual sounds you like to fill in the banks for the font you're working on.
You can only load new fonts onto your saber using the launcher. When you do, the new font overwrites the old one erasing it and leaving you with the new one.
Quick tips: if possible always use freshly charged batteries when hooking your saber up to the launcher. Always turn your saber on FIRST, then open your launcher. When finished, CLOSE the launcher before disconnecting or powering off your saber.
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Hope this helps to get you started. Any other questions don't hesitate to ask