Note

Note 包含了 NoteOn 与 NoteOff 两个事件，可以帮助你快速生成音符。

初始化

A4=69 or 81?

不同的库、编曲软件可能会有不同的标准，本项目中设定 A4=69

不同方法初始化 Note。

>>> from infmidi import Note
>>> Note('A4')
Note(name="A4", value=69, frequency=440.00, location=0.00, length=1.00, velocity=127, channel=0)
>>> Note('A4') == Note(69) == Note(440.)
True

提示

name、 value 和 frequency 这三个属性是相互关联的，改变其中一个，另外两个也会改变。

转调

Use - or + to change the value.

>>> Note('A4') - 12 == Note('A3')
True
>>> Note('A4') + 12 == Note('A5')
True
>>> Note('A4') + 8
Note(name="F5", value=77, frequency=698.46, location=0.00, length=1.00, velocity=127, channel=0)

平移

Use >> or << to change the location.

>>> Note('A4', location=2.) >> 4
Note(name="A4", value=69, frequency=440.00, location=6.00, length=1.00, velocity=127, channel=0)
>>> Note('A4', location=4.) << 2
Note(name="A4", value=69, frequency=440.00, location=2.00, length=1.00, velocity=127, channel=0)

缩放

Use ^ and * to zoom and scale the note.

>>> Note('A4', location=2., length=3.) ^ 3
Note(name="A4", value=69, frequency=440.00, location=6.00, length=9.00, velocity=127, channel=0)
>>> Note('A4', location=2., length=3.) * 3
Note(name="A4", value=69, frequency=440.00, location=2.00, length=9.00, velocity=127, channel=0)

通道

使用 @ 来修改音符的通道

>>> Note('A4', channel=7)
Note(name="A4", value=69, frequency=440.00, location=0.00, length=1.00, velocity=127, channel=7)
>>> Note('A4', channel=7) @ 12
Note(name="A4", value=69, frequency=440.00, location=0.00, length=1.00, velocity=127, channel=12)

提示

All operators above have an inpalce version and an method version, click here to see the cheat sheet.