实时程序的声音与Python？ [英] Real-time procedural sounds with Python?

问题描述

我想要做程序的声音在Python，瞬间回放，而不是将它们保存到一个文件中。我应该是用这个？我可以只使用内置模块，否则我将需要额外的东西？

I want to do procedural sounds in Python, and instantly play them back rather than save them to a file. What should I be using for this? Can I just use built-in modules, or will I need anything extra?

我可能会想改变音高，音量，这样的事情。

I will probably want to change pitch, volume, things like that.

推荐答案

使用 scikits.audiolab 应该做的伎俩。 AUDIOLAB的有 播放 它支持ALSA和核心音频后端功能。

Using numpy along with scikits.audiolab should do the trick. audiolab has a play function which supports the ALSA and Core Audio backends.

下面是一个如何你可能会产生简单的正弦波使用numpy的一个例子：

Here's an example of how you might produce a simple sine wave using numpy:

from __future__ import division
import numpy as np

def testsignal(hz,amplitude = .5,seconds=5.,sr=44100.):
    '''
    Create a sine wave at hz for n seconds
    '''
    # cycles per sample
    cps = hz / sr
    # total samples
    ts = seconds * sr
    return amplitude * np.sin(np.arange(0,ts*cps,cps) * (2*np.pi))

要在440赫兹产生正弦波五秒钟，听它，你会做：

To create five seconds of a sine wave at 440 hz and listen to it, you'd do:

>>> from scikits.audiolab import play
>>> samples = testsignal(440)
>>> play(samples)

注意播放是一个阻塞调用。直到声音已完成播放控制不会返回到你的code。

Note that play is a blocking call. Control won't be returned to your code until the sound has completed playing.

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