http://www.youtube.com/watch?v=JXBFG2vsyCM
Rhythm – After listening to the song, we can hear that the song is written in duple meter with 2 beats per measure. Given that this is a song that you may be able to steadily bop your head to, I believe it would be safe to say the song has an andante tempo.
Melody – The song never really reaches a point to where it really sounds joyful and cheery, rather it sounds a little more on the calm and somber side. That being said, I would say the song is written in a minor scale.
Harmony – From the beginning, the instrumentation seems to sound like an organ along with a bass guitar, and after 10 seconds in, the percussion comes in as well to accompany the main melody. This would also determine the song to have a homophonic texture. In each one of the choruses (1:28, 2:58), there also comes a scratch from a DJ to accompany as well. Nas certainly does not vary in his dynamics in this song. He stays right in between of being loud and quiet.
Form – Not completely sure, however, with an educated guess, I would say the song is written in ternary form. Part A is repeated almost all throughout the song except, I believe, in the chorus, which would make up part B, and then goes back to A.
Timbre – To me the music sounds almost like a grimy, but at the same time, calming.