All what was needed to recognize and memorize intervals was that they were given a name. Relative hearing is a question of memory. Once you heard and memorized a specific interval in a certain piece of music, you will recognize it anywhere else. Let's take the following: MajorSecond.mid. What comes next? Was I thinking about: Sunshine.mid or Funky.mid? The point is: once I heard Cream's "Sunshine of Your Love" and knew it starts with a major second, when I heard "Funky Town", I realized it starts with a major second too. That's why it's so important to try to play on your instrument all the melodies you can remember. Listen to what you play, think about the intervals. Another thing to remember should be chord sequences. The most popular chord sequences include the root (I), the fourth(IV) and the fifth(V) chords. The three chords are very easy to recognize in classic blues. Can you recognize them also in another context? Can you recognize them when they are only a part of a more complex chord sequence where they merge with other chords? The ear, like the eye, has its memory. All you need is to be aware of it.
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