Musicpy is a music programming language in Python designed to write music in very handy syntax through music theory and algorithms.
Home Page: https://musicpy.readthedocs.io/en/latest/
License: GNU Lesser General Public License v2.1
Discord: Rainbow Dreamer#7122
Email: [email protected] / [email protected]
qq: 2180502841
qq discussion group: 364834221
Bilibili: Rainbow_Dreamer
I'm trying to get started with the sampler. I'm finding it hard to get started, the information is here but it's a bit to complicated for someone who doesn't know this module. It would help if there was a very simple example. Ive spent the last couple of days trying to figure out how to start.
If I had an example that shows how to do the following, it would be much easier to start.
1 drum loaded as a WAV file with a very simple sequence.
I sf2 loaded with an explanation of how to load a specific preset
simple chord progression of the sF2
A short loop made from the 2 sequences.
Play the loop
Export the loop
🙏🏼🙏🏼
可以将当前 Readme 的内容整理到 Wiki 作为项目的 Quick Start 文档供他人查阅，Readme 可以讲述项目的安装、使用和贡献项目的方法。
合理编写 Readme 将有助于其他人使用，甚至是贡献项目！:D
Could you give a simple example on your Wiki how to create a simple melody. It is not clear to me how to play a simple sequence of notes. I tried the only_notes function but get the same output. If I want to play notes without the cords how would you do this?
您好，我现在做出peace片段后想要导出mp3或者midi格式的文件，但是配置取样机似乎较为麻烦，因为我的项目需要迁移给另外一个人，想问一下您有没有其他方式进行音频的导出？感谢您的解答！
你好，请问我在用.split_melody(mode='notes')函数分离得到的主旋律音符对象，我的note对象里的duration是float类型的，这个是秒为单位的还是wiki文档里写的以节为单位的呢？如果是以节为单位的，是以默认的480ticks_per_beat和4/4分音符计算的，还是按每首歌自己不同的情况计算的
Line 865 in e66b4cc
Lines 3019 to 3020 in ead467d
build([track1,track2,track3])，而不是build(track1,track2,track3)）inputs_text 的 text：清在这里输入 -> 请在这里输入
play函数在linux下，会报错
In [8]: play(note('A',5))
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
<ipython-input-8-e5677dd3da72> in <module>
----> 1 play(note('A',5))
~/.pyenv/versions/3.8.0/lib/python3.8/site-packages/musicpy/musicpy.py in play(chord1, tempo, track, channel, time1, track_num, name, modes)
198 track_num=1,
199 mode=modes)
--> 200 os.startfile(f'{name}.mid')
201
202
AttributeError: module 'os' has no attribute 'startfile'
但是在当前目录生成了个 temp.mid 能够播放。目测是 linux下的python没有 os.startfile 这个函数，仅仅windows才有，希望跨平台适配。
作为一个面向音乐人的工具，用五线谱显示比用文本显示更直观。
对于这个功能，我正在开发music21py库，用来在music21和musicpy两个库的对应数据结构之间进行转换。可以先转为music21对象，再用show()显示五线谱。
例如 https://github.com/oxygen-dioxide/music21py#%E7%A4%BA%E4%BE%8B
比如增加滑音颤音的参数，接收lambda表达式（传入根据音符回放时间变化的量）或者数值
能直接运行的那种
Arch 下用 pip 安装， python 3.9 ，使用 play 函数就这样，
代码如下：
from musicpy import *
a = note('A', 5)
play(a)报错：
/usr/lib/python3.9/site-packages/musicpy/musicpy.py in play(chord1, tempo, track, channel, time1, track_num, name, modes, instrument, i, save_as_file, deinterleave)
235 if save_as_file:
236 result_file = name
--> 237 pygame.mixer.music.load(result_file)
238 pygame.mixer.music.play()
239 else:
error: Couldn't open /etc/timidity/freepats.cfg
经过检查 /etc/timidity 这个目录没有，个人觉得这些文件可以直接放在包下的。
nice to have complete note conversion feature
e.g.
note_scientific = C4
note_helmholtz = c'
note = C
octave = 4
frequency_integer = 262
frequency_float = 261.6
midi = 60
ref
https://sugizo.pythonanywhere.com/music/master/pitch (for data gathered from wiki)
https://en.wikipedia.org/wiki/Musical_note (for explaination)
if you interest, can share the API data for note above from the web (sugizo.pythonanywhere.com/music)
best regards
When using this code from the github example, I was unable to set the 'volume' argument for tracks.
new_piece = build(track(A1, instrument='Acoustic Grand Piano', start_time=0, channel=1, track_name='piano'))
This works, as does setting volume= for new_piece.
new_piece = build(track(A1, instrument='Acoustic Grand Piano', start_time=0, channel=1, track_name='piano',volume=40))
The error came up when using the 'play' method
File "C:\Users\vlign\AppData\Local\Programs\Python\Python310\lib\site-packages\musicpy\musicpy.py", line 240, in play
file = write(current_chord=current_chord,
File "C:\Users\vlign\AppData\Local\Programs\Python\Python310\lib\site-packages\musicpy\musicpy.py", line 849, in write
current_volume_channel = current_channel if each.channel is None else each.channel
AttributeError: 'int' object has no attribute 'channel'
如图，在页面加载完毕后，无论是中文版还是英文版页面，速查表均会出现排版问题，具体表现为表格宽度过宽，导致表格无法一次性显示水平方向上的所有内容，需要通过滑动页面最下方的滑条才能浏览，非常不方便。
您好，
我對於和弦判斷算法邏輯這部分特別有興趣，我想要幫忙將這部分算法條目給英翻中。
但我對於github wiki的使用不夠熟，想請問有沒有甚麼特別的內嵌功能可以在原來英文條目添加中文內容，做language switching的時候只顯示特定語言內容；還是一定得開新的頁面添加中文條目?
musicpy\musicpy.py", line 771, in write
current_chord.track_number, current_chord.start_times, current_chord.instruments_numbers, current_chord.bpm, current_chord.tracks, current_chord.track_names, current_chord.channels, current_chord.pan, current_chord.volume
AttributeError: 'str' object has no attribute 'track_number'
作者您好，我按照b站教程，运行如下代码
from musicpy import *
a=note('A',5,duration=3)
b=chd("C5","maj7",duration=1,intervals=1)
play(a)
# print(b)play这句报错：sh: temp.mid: command not found
请问我该如何处理.
我看了一下play函数的源代码如下
def play(chord1,
tempo=80,
track=0,
channel=0,
time1=0,
track_num=1,
name='temp.mid',
modes='quick',
instrument=None,
save_as_file=True):
file = write(name_of_midi=name,
chord1=chord1,
tempo=tempo,
track=track,
channel=channel,
time1=time1,
track_num=track_num,
mode=modes,
instrument=instrument,
save_as_file=save_as_file)
if save_as_file:
result_file = name
if sys.platform.startswith('win'):
os.startfile(result_file)
elif sys.platform.startswith('linux'):
import subprocess
subprocess.Popen(result_file)
elif sys.platform == 'darwin':
os.system(result_file)
else:
return file我的电脑是mac，该如何处理这个问题呢。现在在同级目录下有temp.mid这个文件，只是不能播放。需要拖入第三方录音软件听。
I have a question regarding the interval description:
Starting from a JSON structure, I would like to convert to a musicpy piece and then do a chord analysis as follows :
import json as js
import musicpy as mp
json=js.loads("""[{
"chd": "Cm7",
"time": 0.5,
"arp": 0.125,
"start": 0,
"inst": "Acoustic Grand Piano"
},
{
"chd": "Dsus",
"time": 0.5,
"arp": 0.125,
"start": 0.5,
"inst": "Acoustic Grand Piano"
},
{
"chd": "Caug7",
"time": 0.5,
"arp": 0.125,
"start": 1,
"inst": "Acoustic Grand Piano"
},
{
"chd": "Dadd2",
"time": 0.5,
"arp": 0.125,
"start": 1.5,
"inst": "Acoustic Grand Piano"
},
{
"chd": "Cm7",
"time": 0.5,
"arp": 0.125,
"start": 2,
"inst": "Acoustic Grand Piano"
},
{
"chd": "Dsus",
"time": 0.5,
"arp": 0.125,
"start": 2.5,
"inst": "Acoustic Grand Piano"
},
{
"chd": "Caug7",
"time": 0.5,
"arp": 0.125,
"start": 3,
"inst": "Acoustic Grand Piano"
},
{
"chd": "D,G,A,A# / Dadd2",
"time": 0.5,
"arp": 0.25,
"start": 3.5,
"inst": "Acoustic Grand Piano"
}
]""")
def convert_to_mp(chp : list, bpm : float=138, name: str='Progression 0') -> mp.piece:
"""Convert a chord-progression from a dict `chd` to a musicpy object
Args:
chp (list): chord progression
bpm (float): BPM to play the song at.
Returns:
mp.piece: musicpy piece from chord progression
"""
chord = [mp.C(i['chd']) % (i['time'], i['arp']) for i in chp]
inst = [i['inst'] for i in chp]
start = [i['start'] for i in chp]
bpm, chdnotes, _ = mp.piece(chord,inst,bpm,start,['0']*len(chord)).merge()
return mp.build(mp.track(chdnotes),bpm=bpm,name=name)
piece=convert_to_mp(chp=json, bpm=138, name='Progression 0')
mp.chord_analysis(piece.tracks[0])
But this returns ['Cmaj13#11 omit B, G sort as [1, 3, 2, 4, 5]']. I noticed that Track 0 never has any 0-intervals, which I see in other songs.
(output from piece.tracks[0]):
[C4, D#4, G4, A#4, D4, G4, A4, C4, E4, G#4, A#4, D4, E4, F#4, A4, C4, D#4, G4, A#4, G4, C5, D5, G4, B4, D#5, F5, D4, E4, F#4, A4, D5, F#5, A5] with interval [0.125, 0.125, 0.125, 0.125, 0.125, 0.125, 0.25, 0.125, 0.125, 0.125, 0.125, 0.125, 0.125, 0.125, 0.125, 0.125, 0.125, 0.125, 0.125, 0.125, 0.125, 0.25, 0.125, 0.125, 0.125, 0.125, 0.25, 0.25, 0.25, 0.25, 0.25, 0.25, 0.5]
Could you please explain what I am missing?
Thank you so much!
现在使用和弦语法构成和弦似乎默认是以升号表示半音。以三和弦为例，一般认为三和弦是1 3 5的变化，比如
C 大三和弦：1 3 5
Cm 小三和弦 ：1 b3 5
Caug 增三和弦：1 3 #5
Cdim 减三和弦 ：1 b3 b5
当使用musicpy.C('Cdim')构建和弦，和弦的构成音为[C4, D#4, F#4]，能否修改为默认显示[C4, Eb4, Gb4]？这样对于后续进行乐理角度的分析更方便。其他七九十一和弦等等复杂和弦同理。
environment
google colab
code
same like on your git and pypi
pip install -U musicpy
from musicpy import *
guitar = (C('CM7', 3, 1/4, 1/8)^2 |
C('G7sus', 2, 1/4, 1/8)^2 |
C('A7sus', 2, 1/4, 1/8)^2 |
C('Em7', 2, 1/4, 1/8)^2 |
C('FM7', 2, 1/4, 1/8)^2 |
C('CM7', 3, 1/4, 1/8)@1 |
C('AbM7', 2, 1/4, 1/8)^2 |
C('G7sus', 2, 1/4, 1/8)^2) * 2
play(guitar, bpm=100, instrument=25)
result
error Traceback (most recent call last)
[<ipython-input-9-e2f1c6daee5e>](https://localhost:8080/#) in <cell line: 1>()
----> 1 play(guitar, bpm=100, instrument=25)
[/usr/local/lib/python3.10/dist-packages/musicpy/musicpy.py](https://localhost:8080/#) in play(current_chord, bpm, channel, start_time, name, instrument, i, save_as_file, msg, nomsg, ticks_per_beat, ignore_instrument, ignore_bpm, ignore_track_names, wait, **midi_args)
291 if save_as_file:
292 result_file = name
--> 293 pygame.mixer.music.load(result_file)
294 pygame.mixer.music.play()
295 if wait:
error: mixer not initialized
best regards
如题，在structures.py的1204行里有这样的语句：
available_notes = [i for i in self.notes if type(i) == note]根据上下文来看，这里的意思是，当ind参数设置为all以后，需要对self.notes里的每个内容进行类型检查，只有那些类型为note的对象才会被修改音量。但是self.notes应该在创建的时候就应该把输入转换成了 note 类型了，如果一定要做类型检查，也应该是在self.notes创建、新增的时候进行检查，而不应该在setvolume这样的方法里做检查。
另外，1199行each = self.notes[current - 1]中的current还没有进行初始化，假如vol类型为int，而ind类型为list，那么进入该分支则会报错。
刚刚看到21年加入了区段pitch bend，可以使某点后的音符细微变调，这功能很赞
那么，怎么才能在某一个音符内部实现一个线性或者特定数学函数控制的pitch？比如一个长音，以B4开始，到一半时长开始降调，一直到结束时的A4，或者一个D4，开始时快速向D#4抖动一下再拉回来，配合拨弦音色整出颤音——话说MIDI支持这种指令吗？
Hi, I just found there is a small mismatch of variable assignment here:
Construct scales according to interval relationships or key names,
where a C5 major scale should be assigned with intervals [2, 2, 1, 2, 2, 2, 1](guess it's a typo with an additional 2 in the list):
scale('C5', interval = [2,2,1,2,2,2,2,1])Close the issue any time when it's updated :-)
When playing wav samples of 32bit/44.1khz wav files, the sampler plays them back at the wrong speed which pitches them down. I haven't checked but I would guess that 8/12bit files will playback pitched up.
创建一个音符后，degree属性可修改，但修改后其他属性并不会跟着改，会得到一个错误的音符
例如以下代码：
>>> from musicpy import *
>>> a = note('A', 5)
>>> a.__dict__
{'name': 'A', 'num': 5, 'degree': 81, 'duration': 0.25, 'volume': 100, 'channel': None}
>>> a.degree=80
>>> a.__dict__
{'name': 'A', 'num': 5, 'degree': 80, 'duration': 0.25, 'volume': 100, 'channel': None}Hi, thanks for the library .
I have a query
Is it not possible to run musicpy in google collab ? I always get mix not initialized error after installing the library
Second how can one export the chord progression as a midi file or wave file ?
I'd like to use this module to generate loops using a server. But when you try to load the module it tries to initiate the audio interface which fails without an audio interface.
I don't need to playback the audio, I just need to export the loops I generate as WAV file.
The work around is to create a dummy audio interface but it's complicated and I'm having issues keeping the dummy interface running.
否则，仅仅只是代码和逻辑化乐理，无法抓住人的注意力，至少不能马上看到Demo
Line 2650 in 3457682
Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple
Collecting musicpy
Downloading https://pypi.tuna.tsinghua.edu.cn/packages/c1/d1/46c78c9c1d6968c88436a0e93e7c314e26f1c441692ced349565a39eb98e/musicpy-1.60.tar.gz (100 kB)
|████████████████████████████████| 100 kB 576 kB/s
Requirement already satisfied: mido in /usr/local/lib/python3.5/dist-packages (from musicpy) (1.2.9)
Requirement already satisfied: midiutil in /usr/local/lib/python3.5/dist-packages (from musicpy) (1.2.1)
Requirement already satisfied: pygame in /usr/local/lib/python3.5/dist-packages (from musicpy) (2.0.1)
Requirement already satisfied: pillow in /usr/lib/python3/dist-packages (from musicpy) (3.1.2)
Building wheels for collected packages: musicpy
Building wheel for musicpy (setup.py) ... error
ERROR: Command errored out with exit status 1:
command: /usr/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-i9geki1a/musicpy_7ae0f7c0837b41c5bb9dd7ab1acbc3bd/setup.py'"'"'; __file__='"'"'/tmp/pip-install-i9geki1a/musicpy_7ae0f7c0837b41c5bb9dd7ab1acbc3bd/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d /tmp/pip-wheel-7ke3swbq
cwd: /tmp/pip-install-i9geki1a/musicpy_7ae0f7c0837b41c5bb9dd7ab1acbc3bd/
Complete output (28 lines):
/usr/lib/python3.5/distutils/dist.py:261: UserWarning: Unknown distribution option: 'long_description_content_type'
warnings.warn(msg)
running bdist_wheel
running build
running build_py
creating build
creating build/lib
creating build/lib/musicpy
copying musicpy/__init__.py -> build/lib/musicpy
copying musicpy/structures.py -> build/lib/musicpy
copying musicpy/match.py -> build/lib/musicpy
copying musicpy/database.py -> build/lib/musicpy
copying musicpy/musicpy.py -> build/lib/musicpy
running egg_info
writing top-level names to musicpy.egg-info/top_level.txt
writing musicpy.egg-info/PKG-INFO
writing dependency_links to musicpy.egg-info/dependency_links.txt
writing requirements to musicpy.egg-info/requires.txt
reading manifest file 'musicpy.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
writing manifest file 'musicpy.egg-info/SOURCES.txt'
creating build/lib/musicpy/__pycache__
copying musicpy/__pycache__/__init__.cpython-37.pyc -> build/lib/musicpy/__pycache__
copying musicpy/__pycache__/database.cpython-37.pyc -> build/lib/musicpy/__pycache__
copying musicpy/__pycache__/match.cpython-37.pyc -> build/lib/musicpy/__pycache__
copying musicpy/__pycache__/musicpy.cpython-37.pyc -> build/lib/musicpy/__pycache__
copying musicpy/__pycache__/structures.cpython-37.pyc -> build/lib/musicpy/__pycache__
error: can't copy 'musicpy/__pycache__': doesn't exist or not a regular file
----------------------------------------
ERROR: Failed building wheel for musicpy
Running setup.py clean for musicpy
Failed to build musicpy
Installing collected packages: musicpy
Running setup.py install for musicpy ... error
ERROR: Command errored out with exit status 1:
command: /usr/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-i9geki1a/musicpy_7ae0f7c0837b41c5bb9dd7ab1acbc3bd/setup.py'"'"'; __file__='"'"'/tmp/pip-install-i9geki1a/musicpy_7ae0f7c0837b41c5bb9dd7ab1acbc3bd/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-gamuuxo2/install-record.txt --single-version-externally-managed --compile --install-headers /usr/local/include/python3.5/musicpy
cwd: /tmp/pip-install-i9geki1a/musicpy_7ae0f7c0837b41c5bb9dd7ab1acbc3bd/
Complete output (28 lines):
/usr/lib/python3.5/distutils/dist.py:261: UserWarning: Unknown distribution option: 'long_description_content_type'
warnings.warn(msg)
running install
running build
running build_py
creating build
creating build/lib
creating build/lib/musicpy
copying musicpy/__init__.py -> build/lib/musicpy
copying musicpy/structures.py -> build/lib/musicpy
copying musicpy/match.py -> build/lib/musicpy
copying musicpy/database.py -> build/lib/musicpy
copying musicpy/musicpy.py -> build/lib/musicpy
running egg_info
writing musicpy.egg-info/PKG-INFO
writing requirements to musicpy.egg-info/requires.txt
writing top-level names to musicpy.egg-info/top_level.txt
writing dependency_links to musicpy.egg-info/dependency_links.txt
reading manifest file 'musicpy.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
writing manifest file 'musicpy.egg-info/SOURCES.txt'
creating build/lib/musicpy/__pycache__
copying musicpy/__pycache__/__init__.cpython-37.pyc -> build/lib/musicpy/__pycache__
copying musicpy/__pycache__/database.cpython-37.pyc -> build/lib/musicpy/__pycache__
copying musicpy/__pycache__/match.cpython-37.pyc -> build/lib/musicpy/__pycache__
copying musicpy/__pycache__/musicpy.cpython-37.pyc -> build/lib/musicpy/__pycache__
copying musicpy/__pycache__/structures.cpython-37.pyc -> build/lib/musicpy/__pycache__
error: can't copy 'musicpy/__pycache__': doesn't exist or not a regular file
----------------------------------------
ERROR: Command errored out with exit status 1: /usr/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-i9geki1a/musicpy_7ae0f7c0837b41c5bb9dd7ab1acbc3bd/setup.py'"'"'; __file__='"'"'/tmp/pip-install-i9geki1a/musicpy_7ae0f7c0837b41c5bb9dd7ab1acbc3bd/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-gamuuxo2/install-record.txt --single-version-externally-managed --compile --install-headers /usr/local/include/python3.5/musicpy Check the logs for full command output.
这是报错信息，是不是什么地方bug了？
Hi , first of all kudos to work done by you . I am not sure if you are aware of hook pad theory ? basically it is sketching notes and chords with tones of options . It helps in understanding theory in a visual way. I am wondering if the sketch pad can be converted directly into a midi file with musicpy ?
An example for one of the songs is here :https://www.hooktheory.com/theorytab/view/the-beatles/here-comes-the-sun where you can edit the chords and notes.
I think it could be super useful to use both musicpy and hooktheory for faster learning. It was just a thought as hook theory has also lots of music resources
lambda x: (rest(1/4) | x @ [-2.2, -2.3, -2.3] % ([1/4, 1/4, 1/4], [1/4, 1/4, 1/4]))
TypeError: unsupported operand type(s) for |: 'rest' and 'chord'
Hello again,
Similar to Rainbow-Dreamer/sf2_loader#1, I cannot hear any sound when using the sample code found in the README:
from musicpy import *
guitar = (C('CM7', 4, 1/4, 1/8) ^ 2 | C('G7sus', 3, 1/4, 1/8) ^ 2
| C('A7sus', 3, 1/4, 1/8) ^ 2 | C('Em7', 3, 1/4, 1/8) ^ 2 |
C('FM7', 3, 1/4, 1/8) ^ 2 | C('CM7', 4, 1/4, 1/8)@1 |
C('AbM7', 3, 1/4, 1/8) ^ 2 | C('G7sus', 3, 1/4, 1/8) ^ 2)
play((guitar * 2)-octave, 100, instrument=25)当开始播放一段旋律之后，就不能暂停播放，只能等待播放完毕，也不能拖动进度条。
在jupyter notebook中的解决方案：先判断是否为jupyter notebook
def is_jupyter_notebook()->bool:
try:
get_ipython().__class__.__name__
#jupyter notebook
return True
except NameError:
#普通命令行
return False如果不是，则仍使用原来的音频api播放
如果是，则使用jupyter的api播放
播放音频：
#音频数据为audiodata，numpy数组
if(is_jupyter_notebook()):
from IPython.display import Audio
return Audio(data=audiodata, rate=44100)效果：
I would like to develop a score analysis program and I would like to get time signature of each bar.
As a result, I find that time_signature is a message, which can be accessed by bar.other_messages, if the message is present. (If my way of accessing it is wrong, thanks for pointing out)
I have a minuet of 3/4.
Logic pro x gives the correct time signature.
But in musicpy,
# musicpy.py:948
current_message = time_signature(
track=track_ind,
time=time,
numerator=message.numerator,
denominator=int(math.log(message.denominator, 2)), #this line
clocks_per_tick=message.clocks_per_click,
notes_per_quarter=message.notated_32nd_notes_per_beat)
Logarithm is applied to denominator, and if I print(msg.numerator, msg.denominator), I would get 3/2, which is different from expected.
I am curious about the logarithm. It should be intentional, but I don't quite understand. Thanks!
经过阅读您的源码我找到了导出音频的方法，感谢您优秀的编码！
Hi, I tried some of the demos of sf2_loader and musicpy, but without sleeping, all the notes/pieces won't be played and the program exited in advance. After looking into the code and doing some googling, I found that the audio is played underlying by pygame.mixer, which is supposed to play the audio in the background without blocking(which makes sense in game, discussed in this stackoverflow thread). So after adding a sleep(some_seconds), the demos work as expected.
I tried this on Windows and Linux, with pygame [email protected], sleep is essential in both systems. Is there anything else I have to care if I want to try the demo without sleep? Or this is the design then maybe it's better to add a line of code in the tutorial demos?
Oh, almost forgot to say, it's a great project, good job!
能不能加入一种对象，可以像note一样插进一段chord里，其长度为0，作用是被处理到时更改后续序列的tempo，如果chord被打包进piece，则对整个piece生效，类似daw上的tempo轨那样
另外有个小问题，为什么musicpy的volume最高能设定到255？midi标准是到127的，做了一个包含大于127的音符的midi在fluidsynth播放缺音，提示超出127，导入musescore也是大面积缺音，但用java写的播放程序调用jvm自带的gervill就可以正常播放；如果把音符全改成127以下，fluidsynth正常播放，但声音很小，和手上一些其他的midi文件相比只有一半左右，这是什么情况？后续会修复吗？
运行测试demo，无法产生音效，只有‘dep’的声音
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