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audio_play.py

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# -*- coding: UTF-8 -*-

#录音流

import audio

from machine import Pin

import utime

'''

外接喇叭播放，参数选择0

'''

pa_enable_pin = Pin(Pin.GPIO29, Pin.OUT, Pin.PULL_DISABLE, 1)

pa_enable_pin.write(1)

rec = audio.Record(0)

aud = audio.Audio(0)

record_time = 5 #录音时间，单位秒

buf = bytearray(0) #空buff用来缓存音频

aud_type = rec.AMRNB

aud.setVolume(10)#设置音量，范围0-11，0为静音，11为最大

def stream_rec_cb(para):

global buf

# print("para:", para)

if(para[0] == 'stream'):

if(para[2] == 1):

read_buf = bytearray(para[1])

rec.stream_read(read_buf,para[1])

buf += read_buf

del read_buf

elif (para[2] == 3):

pass

aud.stopPlayStream()

aud.playStream(aud_type, buf)

if __name__ == "__main__":

rec.end_callback(stream_rec_cb)

print("record after 5s")

utime.sleep(5)

print("record start")

rec.stream_start(aud_type, 8000, record_time)

utime.sleep(5)

print("record end")