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我通过python和pyaudio在我的电脑上录制了麦克风的声音。当声音以 16 位整数作为其数据类型记录时,它可以正常工作。但是,当它以 32 位浮点数作为其数据类型记录时,它不起作用。

请看下面的代码。如果 FORMAT 设置为 pyaudio.paInt16 它可以按我的意愿工作。但是,当它设置为 pyaudio.paFloat32 时它不起作用,如下所示;

import pyaudio
import wave

CHUNK = 1024
FORMAT = pyaudio.paFloat32
CHANNELS = 1
RATE = 44100
RECORD_SECONDS = 3
WAVE_OUTPUT_FILENAME = "path/to/output_file.wav"

p = pyaudio.PyAudio()
frames = []

stream = p.open(format=FORMAT,channels=CHANNELS,rate=RATE,input=True,frames_per_buffer=CHUNK)

print("* recording")

for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)):
    data = stream.read(CHUNK)
    frames.append(data)

print("* done recording")

stream.stop_stream()
stream.close()
p.terminate()

wf = wave.open(WAVE_OUTPUT_FILENAME, 'wb')
wf.setnchannels(CHANNELS)
wf.setsampwidth(p.get_sample_size(FORMAT))
wf.setframerate(RATE)
wf.writeframes(b''.join(frames))
wf.close()

非常感谢您提前提供的建议和帮助!

更新;

我已经测试了 sounddevice 并且代码如下;

import sounddevice as sd
import wave

CHANNELS = 1
RATE = 44100
RECORD_SECONDS = 5

WAVE_OUTPUT_FILENAME = "path/to/output.wav"

myrecording = sd.rec(int(RECORD_SECONDS * RATE), samplerate=RATE,
                     channels=CHANNELS, blocking=True, dtype='int16')
print(myrecording, 'myrecording')

wf = wave.open(WAVE_OUTPUT_FILENAME, 'wb')
wf.setnchannels(CHANNELS)
wf.setsampwidth(2)
wf.setframerate(RATE)
wf.writeframes(myrecording)
wf.close()

结果与 pyaudio 相同。它在 int16 时有效,但在 32 位浮动作为 dtype 时会产生噪音和声音失真。

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