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Arduino Soundlight
int pin = 11;
int val;
void setup() {
Serial.begin(9600);
}
void loop() {
if (Serial.available() > 0) {
val = Serial.read();
analogWrite(pin, val);
}
}
# Python 2.7 code to analyze sound volume and interface with Arduino
import pyaudio # from http://people.csail.mit.edu/hubert/pyaudio/
import serial # from http://pyserial.sourceforge.net/
import audioop
import sys
import math
def list_devices():
# List all audio input devices
p = pyaudio.PyAudio()
i = 0
n = p.get_device_count()
while i < n:
dev = p.get_device_info_by_index(i)
if dev['maxInputChannels'] > 0:
print str(i)+'. '+dev['name']
i += 1
def arduino_soundlight():
chunk = 2084 # Change if too fast/slow, never less than 1024
scale = 50 # Change if too dim/bright
exponent = 4 # Change if too little/too much difference between loud and quiet sounds
# CHANGE THIS TO CORRECT INPUT DEVICE
# Enable stereo mixing in your sound card
# to make you sound output an input
# Use list_devices() to list all your input devices
device = 2
p = pyaudio.PyAudio()
stream = p.open(format = pyaudio.paInt16,
channels = 1,
rate = 44100,
input = True,
frames_per_buffer = chunk,
input_device_index = device)
print "Starting, use Ctrl+C to stop"
try:
ser = serial.Serial(port='com3')
while True:
data = stream.read(chunk)
rms = audioop.rms(data, 2)
level = min(rms / (2.0 ** 16) * scale, 1.0)
level = level**exponent
level = int(level * 255)
print level
ser.write(chr(level))
except KeyboardInterrupt:
pass
finally:
print "\nStopping"
stream.close()
p.terminate()
ser.close()
if __name__ == '__main__':
#list_devices()
arduino_soundlight()
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