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beats2beats's Issues

怎么训练?

首先我先想问的问题是是否要切片。如果我们第一阶段的产出是一个几秒钟然后不断重复的beat的话,是不是首先要把分出来的单音轨做个切片,然后再对每个切片提取特征。

另外我们要用的学习器应该是怎样的(指一个逻辑,简图),如果是传统的,数据就是特征(或一个向量)+Label(或一个向量),特征可能还好弄,Label(或输出向量)该具有什么含义呢?或者有其他什么奇思妙想。

@FrendoWu @ppzqh

midi文件中音色和速度由什么决定

问题:

midi文件中哪些event决定一个音频的音色和速度?
目前我知道的resolution是跟速度相关的,还有个Tempo啥的
然后ProgramChangeEvent是音色。
但好像两个都不是那么简单的,得确认下。

备注:

我一直觉得midi.ProgramChangeEvent决定一个Track的音色,但是有那么一个Track:
Stan_9_Acoustic_Grand居然是个类似架子鼓的音色(不过我是在看切片的时候发现的这个问题,它的切片也比较麻烦,听起来),可能得弄清楚这个原因,按照我的理解不应该channel之类的相关,实在不清楚。

切片的算法

目前我在topol branch里放了一个极度粗糙的切片的方法,是基于位移加上一个计算方差的方法。

存在的问题:

  • 有时候切的太小
  • 有时候切的太大
    (上面两个都可以听Big_Poppa的1,2channel)
  • 存在多个重复片段怎么办
    (Stan这种比较复杂的可以听一下,有这个问题)

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