python - 同时使用 pyaudio 播放和录制声音

Question

我正在尝试创建一个程序来立即回复。我似乎无法让它发挥作用。有些网站说使用 numpy 数组，但我不知道如何使用。

import pyaudio
import wave
import time
import multiprocessing as mp
import pyaudio
import numpy as np
import sounddevice as sd

fs = 44100
FORMAT = pyaudio.paInt16
CHANNELS = 2
RATE = 44100
CHUNK = 1024
audio = pyaudio.PyAudio()
RECORD_SECONDS = 5
stream = audio.open(format=FORMAT, channels=CHANNELS,
                rate=RATE, input=True,
                frames_per_buffer=CHUNK)
myarray = []
for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)):
    data = stream.read(CHUNK)
    myarray.append(data)

    myrecording = sd.play(myarray, fs, channels=2)

Traceback (most recent call last): File "SoundTest.py", line 24, in myrecording = sd.play(myarray, fs, channels=2) line 2170, in check_data dtype = _check_dtype(data.dtype) File "/home/lordvile/.local/lib/python2.7/site-packages/sounddevice.py", line 2316, in _check_dtype raise TypeError('Unsupported data type: ' + repr(dtype)) TypeError: Unsupported data type: 'string32768'

Answer 1

下面是同时录制和播放的“PyAudio”和“Sounddevice”的示例。对我来说最重要的是明确地将输入和输出设备设置为有效值。因此，我在这两个示例中都包含了声音设备的打印。

声音设备:

与 PyAudio 相比，它的工作方式就像一个魅力。至少对我来说，sounddevice 提供了一个稳定的接口(interface)，可以同时进行音频录制和播放。尽管有一些控制台输出提示输入/输出上溢/下溢，但记录/播放会重新生成，最终我会得到流畅工作的“回声”。

import sounddevice as sd

fs = 44100

def callback(indata, outdata, frames, time, status):
    if status:
        print(status)
    outdata[:] = indata

print(sd.query_devices())

try:
    with sd.Stream(device=(0,1), samplerate=fs, dtype='float32', latency=None, channels=2, callback=callback):
        input()
except KeyboardInterrupt:
    pass

PyAudio:

这段代码应该(？)工作。对我来说，它并不能始终如一地工作。它已经工作了大约一分钟一次，但通常我会收到错误:“OSError:[Errno -9981]输入溢出”。我不知道为什么它总是抛出这个错误，但是你可以自己尝试一下。

import pyaudio
import json

FORMAT = pyaudio.paInt16
CHANNELS = 1
CHUNK = 1024
RATE = 44100

audio = pyaudio.PyAudio()

for i in range(audio.get_device_count()):
    print(json.dumps(audio.get_device_info_by_index(i), indent=2))

stream = audio.open(format              = FORMAT,
                    channels            = CHANNELS,
                    rate                = RATE,
                    input               = True,
                    output              = True,
                    input_device_index  = 0,
                    output_device_index = 1,
                    frames_per_buffer   = CHUNK)

try:
    frames = []
    print("* echoing")
    print("Press CTRL+C to stop")
    while True:
        data = stream.read(CHUNK)
        frames.append(data)
        if len(frames)>0:
            stream.write(frames.pop(0),CHUNK)
    print("* done echoing")
except KeyboardInterrupt:
    stream.stop_stream()
    stream.close()
    audio.terminate()