PyMusic Instrument

关于

一个Python库，可以产生主要由吉他和钢琴演奏的乐器。它使用Pyaudio作为其依赖性。

入门

先决条件

您只需要了解基本的Python语法即可使用此库。

安装

如果以前在计算机中您从未安装过Pyaudio，请执行此操作：

UNIX：

sudo apt-get install libasound-dev portaudio19-dev libportaudio2 libportaudiocpp0

视窗：

从这里下载二进制文件
现在这样做
pip install PyAudio‑0.2.11‑cp39‑cp39m‑win_amd64.whl

然后
python3 -m pip install PyMusic-Instrument

用法

弹钢琴笔记。

 from Instrument import Instrument

piano = Instrument ( bit_rate = 44100 )
piano . record_key ( 52 , duration = 0.3 )  # C5
piano . record_chord ([( 52 , 56 , 61 )], duration = 0.3 )  # C5 E5 A5

piano . play ()
piano . close ()   # Terminates PyAudio

弹吉他弦。

 guitar = Instrument ( 44100 )
guitar . record_key ( 25 , duration = 0.5 )  # A
guitar . play ()
guitar . clear_sample ()  # clears the sample
guitar . close ()

您可以在这里查看相应频率的关键号码。

另外，您也可以绘制图形

 import matplotlib . pyplot as plt

key_colors = { 40 : [ "red" , 1 ], 42 : [ "blue" , 1 ], 44 : [ "green" , 1 ], 45 : [ "gray" , 1 ],
                  47 : [ "orange" , 1 ], 35 : [ "purple" , 1 ], (( 51 , 56 , 61 ),): [ 'black' , 1 ]}

# piano.graphing sample contains key, time take as an array, wave equation as an array.
for key , time , wave in piano . graphing_sample :
    if key_colors [ key ][ 1 ]:
        plt . plot ( time , wave , label = key , color = key_colors [ key ][ 0 ])
        key_colors [ key ][ 1 ] = 0
    else :
        plt . plot ( time , wave , color = key_colors [ key ][ 0 ])

plt . show ()

或幽灵

 import librosa . display

amplitude = librosa . stft ( piano . sample )
db = librosa . amplitude_to_db ( abs ( amplitude ))
plt . figure ( figsize = ( 14 , 5 ))
librosa . display . specshow ( db , sr = 44100 , x_axis = 'time' , y_axis = 'hz' )
plt . colorbar ()
plt . show ()

文档

https://pymusic-instrument.readthedocs.io/en/latest/