在 Python 中生成正弦波声音 [英] Generating sine wave sound in Python
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问题描述
我需要在 Python 中生成正弦波声音,并且我需要能够控制频率、持续时间和相对音量.生成"是指我希望它立即通过扬声器播放,而不是保存到文件中.
I need to generate a sine wave sound in Python, and I need to be able to control frequency, duration, and relative volume. By 'generate' I mean that I want it to play though the speakers immediately, not save to a file.
最简单的方法是什么?
推荐答案
import pyaudio
import numpy as np
p = pyaudio.PyAudio()
volume = 0.5 # range [0.0, 1.0]
fs = 44100 # sampling rate, Hz, must be integer
duration = 1.0 # in seconds, may be float
f = 440.0 # sine frequency, Hz, may be float
# generate samples, note conversion to float32 array
samples = (np.sin(2*np.pi*np.arange(fs*duration)*f/fs)).astype(np.float32)
# for paFloat32 sample values must be in range [-1.0, 1.0]
stream = p.open(format=pyaudio.paFloat32,
channels=1,
rate=fs,
output=True)
# play. May repeat with different volume values (if done interactively)
stream.write(volume*samples)
stream.stop_stream()
stream.close()
p.terminate()
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