音乐节拍提取一

前段时间倒腾了一下音乐节拍数检测，参考下面的网上的一个测试歌曲列表做了下对比，效果还不错，基本上都是准的。

Itunes Link	Name	Time	Artist	BPM	Album	Genre	Amazon Link
	Loneliest Soul	03:35	Grace Potter and the Nocturnals	168	The Lion The Beast The Beat	Alternative	Loneliest Soul
	Quesadilla	03:15	Walk The Moon	151	Walk The Moon	Alternative	Quesadilla
	Melatonin	04:04	Silversun Pickups	159	Carnavas	Alternative	Melatonin
	Synthetica	03:56	Metric	160	Synthetica	Alternative	Synthetica
	Myth	04:18	Beach House	147	Bloom	Alternative	Myth
	I Was Made for You	02:30	She and Him	137	Volume One	Alternative	I Was Made for You
	Youth Without Youth	04:19	Metric	129	Synthetica	Alternative	Youth Without Youth
	Anna Sun	05:21	Walk The Moon	140	Walk The Moon	Alternative	Anna Sun
	Never Go Back	03:40	Grace Potter and the Nocturnals	120	The Lion The Beast The Beat	Alternative	Never Go Back
	Warrior	04:13	Kimbra	120	Vows	Alternative	Warrior (Bonus Track)

实验结果：

　　　　　　　　

部分耗时段优化，提升0.2s左右

                                  

时间效率上还可以做进一步的提升。

这段时间整理完常用的接口，要开始尝试下新的领域。