What is "Mashrokisa"?
Rashi: It is the sound of the horn.
Ibn Ezra: It is a Kli to make a whistling sound.
What are "Kasros Sabecha Pesanterin Sumponeyah"?
Rashi: They are kinds of instruments. Ibn Ezra ? we do not know what kinds of instruments they are. Also in Leshon ha'Kodesh, we do not know for sure Kinor, Mechol, Minim and Ugav.
What are "Zenei Zimra"?
Rashi: They are kinds of song. The Targum of "l'Mino" is li'Znohi.
Malbim: There were seven kinds of song, corresponding to the seven Mesharesim (the sun, moon and five closest plants). They thought that this will draw influence from the ruling stars.
Why do the verses keep repeating "the [gold] image that Melech Nebuchadnetzar set up"?
Malbim: This shows that the primary intent was for like the image that he saw in the dream. Gold hints to Melech Bavel. It repeats Melech Nebuchadnetzar, that his kingship should remain forever.
