This is No.6 from Chopin's set of 24 preludes each in a different major or minor key. The original preludes are for Piano, though this arrangement by Artur Akshelyan is for a woodwind quartet. Here is the full score of the arrangement, and the four parts for Flute, Oboe, Clarinet in B-flat and Bassoon. In this arrangement the bassoon carries the main theme throughout with just a little help from the clarinet.
The audio controls below allow you to play the mp3 version of Chopin's Prelude no.6 for woodwind quartet or you can download the MP3 file. You can also download the midi version of Chopin's Prelude no.6 for woodwind quartet.
The image below is the first page of the sheet music, and here you can download the full sheet music for Chopin's Prelude no.6 for woodwind quartet in PDF format.