| 摘要 |
A musical aid (2) has an elongate body (4) having at least three ridges (8) which extend outwards and along the musical aid (2). Each ridge (8) has two side surfaces (12) and at least two different side surfaces (12) carry respective sets of key-indicating markers (16) which each represent a different group of types of musical pattern. The musical aid (2) has multiple orientations in which it can be placed on a musical keyboard (40), and in each orientation the key-indicating markers (16) of a different side surface (12) indicate keys for playing a different group of one or more musical patterns. The ridge structure of the musical aid (2) enables many different musical patterns to be represented in a compact form on the different side surfaces (12) of the ridges (8). When in use, the shape of the ridge structure anchors the musical aid (2) to the keyboard (40) and causes the side surfaces (12) to be placed a convenient angle for the keyboard player to see the markers (16).
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