I'm not sure specifically which 'DSP Christmas Tree Story' you are referring to. There could be many stories related to Christmas trees in the context of DSP (Digital Signal Processing, though it's an odd combination). Maybe it's a story within a particular DSP - related community or a creative fictional story someone made up. Without more context, it's hard to tell the exact story.
One possible plot could be that a DSP expert wants to create a one - of - a - kind Christmas tree display. So, he uses DSP algorithms to synchronize the twinkling of the lights with music, creating a beautiful audiovisual experience.
The Hunter x Hunter manga is unfortunately not complete. The author has faced various issues that have led to intermittent breaks and an unresolved storyline.
The Hunter x Hunter manga has indeed concluded. However, the ending might have left some fans wanting more or with mixed feelings depending on their expectations.