K230 CanMV 录音时出现有规律的噪声
解决办法：
使用音频3A算法进行降噪，在创建流后新增：
stream.enable_audio3a(AUDIO_3A_ENABLE_ANS)
完整代码如下：
'''
本程序遵循GPL V3协议, 请遵循协议
实验平台: DshanPI CanMV
开发板文档站点 : https://eai.100ask.net/
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百问网官方淘宝 : https://100ask.taobao.com
'''
import os
import time
import sys
from media.media import MediaManager
from media.pyaudio import *
import media.wave as wave
def exit_check():
"""检测退出点或键盘中断"""
try:
os.exitpoint()
except KeyboardInterrupt:
print("User interrupted recording.")
return True
return False
class AudioRecorder:
def __init__(self, filename, duration):
self.filename = filename
self.duration = duration
self.chunk = int(44100 / 25)
self.format = paInt16
self.channels = 1
self.rate = 44100
self.frames = []
def record(self):
"""执行音频录制主流程"""
p = PyAudio()
p.initialize(self.chunk)
MediaManager.init()
stream = p.open(format=self.format,
channels=self.channels,
rate=self.rate,
input=True,
frames_per_buffer=self.chunk)
stream.enable_audio3a(AUDIO_3A_ENABLE_ANS) #音频3A降噪
try:
print(f"Start recording: {self.filename}")
for _ in range(int(self.rate / self.chunk * self.duration)):
data = stream.read()
self.frames.append(data)
if exit_check():
break
self._save_wave(p)
print("Recording finished.")
except Exception as e:
print(f"Exception during recording: {e}")
sys.print_exception(e)
finally:
stream.stop_stream()
stream.close()
p.terminate()
MediaManager.deinit()
def _save_wave(self, pyaudio_instance):
"""将录制的音频保存为 WAV 文件"""
wf = wave.open(self.filename, 'wb')
wf.set_channels(self.channels)
wf.set_sampwidth(pyaudio_instance.get_sample_size(self.format))
wf.set_framerate(self.rate)
wf.write_frames(b''.join(self.frames))
wf.close()
def main():
os.exitpoint(os.EXITPOINT_ENABLE)
print("Audio Recorder Sample Start")
recorder = AudioRecorder("/data/test2.wav", 15)
recorder.record()
print("Audio Recorder Sample Done")
if __name__ == "__main__":
main()