Causing or liable to cause a slight grating noise: (Dictionary.com)
Consisting of or marked by scratches. (Dictionary.com)
Uneven; haphazard: (Dictionary.com)
Marked or made with scratches. (Merriam – Webster)
Likely to scratch: Prickly. (Merriam – Webster)
Making a scratching noise. (Merriam – Webster)
Uneven in quality: Ragged. (Merriam – Webster)
A scratchy record, etc. has scratches on it so it makes unpleasant noises when is played. (Cambridge Dictionary)
Scratch clothes are rough and uncomfortable. (Cambridge Dictionary)
(especially of a fabric or garment) having a rough, uncomfortable texture and tending to cause itching or discomfort. (Oxford Dictionaries)
(of a voice or sound) rough; grating. (Oxford Dictionaries)
Get to the Bottom of Your Sore Throat.
A scratchy throat can be more than just an annoyance.
Audio Is Distorted or Scratchy – Intel
Distorted or scratchy audio can be caused by several problems