我正在使用Adafruit I2S MEMS麦克风分组进行录制。参考https://learn.adafruit.com/adafruit-i2s-mems-microphone-breakout?view=all
当我按照下面的图像以单声道配置将麦克风连接到RPI时,我可以使用arecord命令和下面的python代码录制音频
arecord -D dmic_sv -c2 -r 48000 -f S32_LE -t wav -V mono -v recording.wav
Python代码段:
channels = 1,rate = 48000,frames_per_buffer = 2400
def start_recording(self):
try:
self.logger.info("start_recording()> enter")
# Use a stream with a callback in non-blocking mode
self._stream = self._pa.open(format=pyaudio.paInt32,
channels=self.channels,
rate=self.rate,
input=True,
frames_per_buffer=self.frames_per_buffer,
stream_callback=self.get_callback())
self._stream.start_stream()
self.logger.info("start_recording()> exit")
return self
except Exception, e:
self.logger.error("start_recording()>", exc_info = True)
但是,如果我将通道选择引脚连接到逻辑高电压,则可以使用arecord命令录制音频,但是可以使用python代码录制音频。 python代码需要录制右声道单声道音频吗?
答案 0 :(得分:0)
我做了类似的事情,但是使用了python-sounddevice。这是我的repo
编辑: 这是需要澄清的特定录音课程
import threading
import queue
import numpy
import sounddevice as sd
import soundfile as sf
class AudioRecorder():
def __init__(self):
self.open = True
self.file_name = 'name_of_file.wav'
self.channels = 1
self.q = queue.Queue()
# Get samplerate
device_info = sd.query_devices(2, 'input')
self.samplerate = int(device_info['default_samplerate'])
def callback(self, indata, frames, time, status):
# This is called (from a separate thread) for each audio block.
if status:
print(status, file=sys.stderr)
self.q.put(indata.copy())
def record(self):
with sf.SoundFile(self.file_name, mode='x', samplerate=self.samplerate, channels=self.channels) as file:
with sd.InputStream(samplerate=self.samplerate, channels=self.channels, callback=self.callback):
while(self.open == True):
file.write(self.q.get())
编辑2:该代码是Python类,它使用I2S麦克风创建音频文件,类似于问题中显示的图像。当值self.open
为true时,sounddevice会将音频数据写入队列(def callback
),然后将数据写入文件。您所要做的就是切换self.open
以开始和停止录制。