Skill Builder: Advanced Arduino Sound Synthesis - Make:
How to control the volume of a buzzer while using the tone() function? - #26 by pert - Programming Questions - Arduino Forum
LC75341 tone control using arduino - Tataylino.com
Arduino - Potentiometer Triggers Piezo Buzzer | Arduino Tutorial
One-transistor audio amplifier for Arduino projects | Bryan Duxbury's Blog
DC piezo buzzer volume control - Arduino Project Hub
GitHub - teckel12/arduino-toneac: Enhanced version of the standard tone library
GitHub - connornishijima/arduino-volume1: Arduino tone() just got 8-bit volume control - with no extra components!
Use tone() with Arduino for an Easy Way to Make Noise - Programming Electronics Academy
Buzzer With Arduino - Piezo Buzzer Tone Code | Speaker
Programmatically change the volume of a piezo buzzer - Audio - Arduino Forum
Arduino Volume Control : 10 Steps (with Pictures) - Instructables
Digital Audio Volume Control Circuit using PT2258 IC and Arduino
Arduino Tone Music: How to Play Musical Notes with Arduino | Arrow.com | Arrow.com
Tone() with 8-bit Volume Control - No Extra Components! - Arduino Project Hub
Arduino Mario Melody tune
LM386 based stereo audio amplifier with digital volume control | Embedded Lab
arduino - Opto-Isolator For Volume Control? - Electrical Engineering Stack Exchange
How To Make a Piezo Buzzer Louder (Arduino)
Arduino buzzer player with adjustable volume - playing a part of Für Elise by Ludwing van Beethoven | Solarian Programmer
One-transistor audio amplifier for Arduino projects | Bryan Duxbury's Blog
Tone() with 8-bit Volume Control - No Extra Components! - Arduino Project Hub
