It's interesting how a lot of these things from our past are turning up all over the place lately. Maybe it's just to signify much more important processes taking place like today's young kabbalists actually attaining these states or at least getting closer .... I tried to find something about King David's palace on kabbalah.info - in the end I found something related to music: 
So now we've uncovered a palace from our past - ... Israeli archaeologist Eilat Mazar believes the evidence she has uncovered during months of excavation and biblical comparison points to an extraordinary discovery. She believes she has found the palace of King David ....
Bnei Heichala means “the sons of King’s Palace,” those desiring to reach the Palace of the King. The King’s Palace is Bina - the property of bestowal, the force of the Creator, the spiritual. The sons are those who yearn to resemble the King in their properties, to become like Him. The word for “Son” (Ben) derives from the word for “understands” (Havana). They yearn to understand the King, and through their understanding, come closer to Him and feel Him.
Hence, Bnei Heichala are the souls aspiring to attain the state of uniting the King in His Palace. For this, they are ready to pass the entire system of corrections, change themselves from the beginning until the end - from the nature in which they were created to the nature of the King, as it is written: “Returned the sons of Israel to the height of their God.” This is what this song is about.
When we reach such a state and become Bnei Heichala, it is called The Final Correction. This is why we sing this song during Mincha (evening prayer) on Shabbat. Shabbat symbolizes the ascents, during which this entire world rises to the Upper World completely and then we all enter the palace of the King.
This is how it is going to be at the end of the development of all humanity - The Final Correction. However, there are souls that are already attaining this state today. This is expressed in three ascents of the Worlds on Shabbat. Those who undergo their individual correction, who study Kabbalah, feel three ascents on Shabbat. The first ascent - in the evening, during the onset of Shabbat; the second - the next day, Shabbat morning, and the third, the biggest ascent during Mincha, at the end of day, when Shabbat ends. And then, during this highest state, we sing the song Bnei Heichala.
The lyrics of this song are composed by the Holy Ari, and the melody - by Baal HaSulam. For this reason, due to the unification of The Ari and Baal HaSulam in one composition, we, entering into this song, really reach the highest ascent that a Kabbalist can experience before the general Final Correction, whereas the entire world rises to that very Palace.
Thus this is a very elevated song, like an anthem of that ascent. This state, so far, is being attained only by those who study Kabbalah, and later, as we expect, all of humankind will attain it.
I find it good news that the people who study kabbalah have a head start in correction. The song, Bnei Heichala, are the words available to everyone? If so, please share them with me. Also the meaning of the words. Thank you for being here for the seekers of the light.
sherry lapp
Posted by: Sherry Lapp | March 21, 2006 at 06:05 PM
Hi Sherry!
It's not just a head start ... it's the only way to get corrected - there is no other way.
Humanity is on the verge of discovering that all the other methods won't fill the point in their heart that has been yearning to be filled since the beginning of time.
I don't have the actual words - but here's a link to the explanation of the song:
http://www.kabbalah.info/engkab/translated_lessons_(texts)/talks/08192005_about_kabbalistic_music.htm
You can hear the song here - it's first on the list:
http://www.kabbalah.info/engkab/mmedia.htm
I really recommend hearing Rav talk about Kabbalah music in this short movie:
http://www.kabbalahmedia.info/VIDEO/eng_TRANS_ShiratHaOlamot_film_2005.wmv
And finally here is a whole site of ours that is devoted to Kabbalah music:
http://www.musicofkabbalah.com/
Maybe they can help you find the actual words.
Enjoy!
Posted by: Josia | March 22, 2006 at 09:50 AM