Possible Clues:

• 'Fundamental to include soil in variety of muck' in notes not really picked up
• Sourcing bad muck to be broadcast in a lift?
• Typically heard creating a scene in land behind yard with swing
• It sets the mood on shows
• Film score, essentially
• Score on TV, often
• Part of some film scores
• Melodious sounds intended to be listened to passively
• What a film score is, essentially
• Down-to-earth about spreading muck around soil -- it accompanies many a scene