adj. contrabass
和弦中低音或最低音的改变影响其性质，但是替换稍高的音则不会影响原和弦的性质。
Changes in the bass or lowest note of a chord affect its nature, but higher notes may be displaced without affecting the nature of the original chord.
音程就是音与音之间的距离，通常由低音到高音以数字计算，在计算中包括最低音和最高音。
Intervals are the distances between notes, generally counted numerically from a lower to a higher note, and including the bottom and top note in the calculation.
也可以转换作中间的音或最上面的音放在原最低音下。
They may also be inverted, with the middle note or top note placed below the original bottom note.
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