和鲨鱼一起冲浪

1 = C (根音)
120 bpm (速度 bit per minute)
4/4
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♩= (4分音符) = 1bit
♪ = 1/2♩(8分音符) = 1/2bit
♫ = 2 x 1/2♩=1bit
-/↓/↑ = 1/2♩(8分音符) = 1/2bit
♬ = 2 x 1/2 ♪ (16分音符) = 1/2bit
| = 小节线  
数字 = 品位 = ♪
(无音符后缀标记时 
默认时值 = 1/2bit) 
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