1  import board
 2  import busio
 3  import adafruit_bd3491fs
 4  
 5  i2c = busio.I2C(board.SCL, board.SDA)
 6  bd3491fs = adafruit_bd3491fs.BD3491FS(i2c)
 7  
 8  bd3491fs.active_input = adafruit_bd3491fs.Input.A
 9  bd3491fs.input_gain = adafruit_bd3491fs.Level.LEVEL_20DB
10  bd3491fs.channel_1_attenuation = 0
11  bd3491fs.channel_2_attenuation = 0