This is an interesting technique that I have found truly helpful for developing speed and the correct rhythmic feel across whatever pattern you are practicing, and since I have not found any reference to it in the literature, I refer to it as aural refocus. Its purpose is to refocus your hearing on the larger beats within a pattern or movement, and then “feed in” the rest of the notes while retaining attention on the larger concept and rhythmic feel.
In theory, we want to perform the larger movements in time—but in practice we rarely do so because we feel limited by all the minutiae that a particular movement demands. With a lot of work, patterns that undergo the aural refocus treatment will get a boost in speed while retaining their rhythmic integrity and stability.
Here are three exercises for applying aural refocus to tremolo. Before you begin, set the metronome to an ambitious tempo (72–88+ bpm per half note) and keep it constant through each exercise. Play only the fingers indicated, do not play the small notes in the following exercises and feel the larger beat in the right hand. Play through each line for at least a minute. Then alternate freely between the lines, coming back to the first line often to reestablish the longer sense of pulse and technical ease.
There you have it!
For more active practice techniques, check out: Mastering Tremolo.