除了外壳，使用fluidsynth和mingus没有声音 [英] No sound using fluidsynth and mingus except in shell

问题描述

我试图按照这个问题。我正在运行Ubuntu 14.04，并且已经创建了一个音频组并将自己添加到其中。
我正在使用alsa。

I am trying to emulate a piano in python using mingus as suggested in this question. I am running Ubuntu 14.04, and have already created an audio group and added myself to it. I am using alsa.

我运行了上述问题的答案之一中给出的代码，并且在shell模式下运行良好。但是，当我编写一个python脚本并尝试运行它时，我什么都听不到。这是我的代码：

I ran the code given in one of the answers to the aforementioned question and it ran fine in shell mode. However, when I wrote a python script and tried to run it, I did not get any sound whatsoever. Here is my code:

#!/usr/bin/env python

from mingus.midi import fluidsynth
DEF_FONT_PATH = '/usr/share/sounds/sf2/FluidR3_GM.sf2'

def main():
    fluidsynth.init(DEF_FONT_PATH, 'alsa')
    fluidsynth.play_Note(80, 0, 80)

if __name__ == '__main__':
    main()

我检查了许多其他答案，但似乎找不到解决方法。

I have checked many other answers, and I cannot seem to find a solution.

推荐答案

我在Mac上，遇到了同样的问题。

I am on a Mac and I ran into the same problem.

使用 time.sleep（）确实是正确的答案，但在我看来，这与等待 fluidsynth.init 完成无关，而是使用 fluidsynth.play_Note（）或 fluidsynth.play_NoteContainer（） c>通话，它应该可以播放。

Using time.sleep() is indeed the correct answer but it does not seem to me that it has to do with waiting for fluidsynth.init to finish, instead use time.sleep() after a fluidsynth.play_Note() or a fluidsynth.play_NoteContainer() call and it should play.

虽然我希望在mingus文档的某个地方提到此内容，网址为 https://bspaans.github.io/python-mingus/ ，他们在GitHub上确实有一些示例，表明它们正是按顺序进行的操作

While I wish this was mentioned somewhere in the mingus documentation at, https://bspaans.github.io/python-mingus/, they do have examples in GitHub that show that this is exactly what they are doing in order to play the notes.

此示例特别有用，因为几乎每次调用 fluidsynth.play_Note（）接下来是 time.sleep（）调用：

This example is particularly helpful being that just about every call to fluidsynth.play_Note() is followed up by a time.sleep() call:

https://github.com/bspaans/python-mingus/blob/master/mingus_examples/ play_progression / play-progression.py

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