Although not included in most traditional ear-training methods, the ability to recognize different sound qualities is a critical skill for most musicians. An experienced player with a sharp ear can quickly discern which instruments should be louder or softer in the mix, which parts need more treble or bass, and where to most effectively apply reverb, echo, and other effects. We group these properties under the general heading of Sound, and learning to identify and describe them is a key part of training your ear.