The song, is in two parts on the album, but is really nine parts.
Here is how the parts break down:
Part I Orchestra-like keyboard chords, some synth horn.
Part II Begins with "Syd's Theme", the four note (Dah DAH dah DAH...) riff that is repeated throughout this part of the song.
Part III Rick's synth horn solo.
Part IV Vocal section.
Part V Sax solo.
Part VI Odd-sounding synth, then goes into some decent lap steel by Gilmour.
Part VII Second vocal section.
Part VIII Jazzy synths.
Part IX Closing funeral dirge-like synth horn solo.
JON: INSTA 10/10!