This music is Beethoven's 6th Symphony in F major which is often called the "Pastoral", due to its programmatic storyline. Unusually for the time it has 5 movements whose descriptions by the composer show the different events depicted as follows: "Arriving in the Countryside", "By the Brook", "Peasants Merrymaking", "Thunder Storm" and "Shepherd's Song". The first movement included here is described as "Arriving in the Countryside" and is a relaxed, cheerful depiction of a peaceful countryside. It is a familiar work which has been used in commercials, television and film, most notably in the animated film "Fantasia".
For musicians we have included here the Full Conductor's Score and the individual parts for the following instruments: 2 Flutes, 2 Oboes, 2 Clarinets (in B-flat), 2 Bassoons, 2 Horns (in F), 1st Violins, 2nd Violins, Violas, Cellos, and Double Basses.
Below is a video illustrating the music in a "piano roll" format. Below that you can play the mp3 file and view the sheet music, while the download links are in the left-hand menu. In addition here is an alternative video which follows the orchestral score.