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/Playback recorder
Created Jan 1, 2018

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python code for a Raspberry Pi playback recorder
import RPi.GPIO as GPIO
import time
import os
butPressed = [True, True, True, True, True, True, True]#if button i is pressed, then butPressed[i] is False
pin = [26, 19, 13, 6, 5, 21, 20]#GPIO pins of each button
recordBool = False#True if a record is in progress
for i in range(0, 7):
GPIO.setup(pin[i], GPIO.IN, pull_up_down=GPIO.PUD_UP)#sets Pi's internal resistors to pull-up
while True:
for i in range(0, 7):
butPressed[i] = GPIO.input(pin[i])#checks if a button is pressed
if butPressed[i] == False:#if a button is pressed
previousTime = time.time()
while butPressed[i] == False and recordBool == False:
butPressed[i] = GPIO.input(pin[i])
if time.time() - previousTime > 1.0:#if the button is pressed for more than a second, then recordBool is True
recordBool = True
if recordBool == True:#if recordBool is True, it plays a beep sound and then records
os.system("aplay -D plughw:CARD=Device_1,DEV=0 beep.wav")
os.system("arecord %d.wav -D sysdefault:CARD=1 -f cd -d 20 &" %i)#records for maximum 20 seconds in file i.wav, with cd quality
while butPressed[i] == False:
butPressed[i] = GPIO.input(pin[i])
os.system("pkill -9 arecord")#the record is stopped when the button is let go, or after 20 seconds
recordBool = False
else:#if recordBool is False, it plays sound i.wav
os.system("aplay -D plughw:CARD=Device_1,DEV=0 %d.wav" %i)
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