See also

You can find out more information using the following references:

• Documentation on the play_tone method can be found at https://circuitpython.readthedocs.io/projects/circuitplayground/en/latest/api.html#adafruit_circuitplayground.express.Express.play_tone.
• More details on the audio spectrum that humans can hear can be found at https://www.teachmeaudio.com/mixing/techniques/audio-spectrum/.