In addition you can call the volume_up and volume_down functions to tell the amp to move up or down a single
volume level. This might be handy if your project only has an up/down volume control.
For example to move up 2 levels and then back down 1 level:
Again be careful to not increase the volume to such a high level that it damages your speakers!
That's all there is to using the MAX9744 amplifier with CircuitPython!
Below is a complete example of setting the volume of the amplifier. Save this as code.py on the board and it will set
the volume to a moderate/half-way level.
Full Example Code
# Simple demo of the MAX9744 20W class D amplifier I2C control.
# This show how to set the volume of the amplifier.
# Author: Tony DiCola
import board
import busio
import adafruit_max9744
# Initialize I2C bus.
i2c = busio.I2C(board.SCL, board.SDA)
# Initialize amplifier.
amp = adafruit_max9744.MAX9744(i2c)
# Optionally you can specify a different addres if you override the AD1, AD2
# pins to change the address.
#amp = adafruit_max9744.MAX9744(i2c, address=0x49)
# Setting the volume is as easy as writing to the volume property (note
# you cannot read the property so keep track of volume in your own code if
# you need it).
amp.volume = 31 # Volume is a value from 0 to 63 where 0 is muted/off and
# 63 is maximum volume.
# In addition you can call a function to instruct the amp to move up or down
# a single volume level. This is handy if you just have up/down buttons in
# your project for volume:
amp.volume_up() # Increase volume by one level.
amp.volume_down() # Decrease volume by one level.
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