לַמְנַצֵּחַ בִּנְגִינוֹת עַל הַשְּׁמִינִית מִזְמוֹר לְדָוִד

To the conductor with melodies on the sheminith, a song of David.

The Sheminit is a biblical stringed musical instrument, looks a bit like our lyre. There were 7, 8 and 10 strings Shemeniths. The number 8 symbolizes what is beyond the nature. Whereas our world is a seven dimensions world (for eg. every item has 4 sides + above and below + it’s center = together seven), the figure 8 is all that is beyond our world. Beyond nature.