I came across your library while looking for a way to both play a buzzer and flash a neopixel. Your library is well done. What I would like to do is be able to take your library, but play my own song. For example my project I want to play Happy Birthday. I was attempting to use the following code:
https://create.arduino.cc/projecthub/trduunze/piezo-happy-birthday-7ea362
They are of course going about it in a complete different way then you. But I was thinking that taking their melody notes, and putting them in to replace your melody notes, would work. However, that gave me a song that was not Happy Birthday.
Would I be right in thinking that it comes down to you dividing the notes by 1,000,000 and then a volume? This is what I see in your .h file.
Any suggestions, or help would be greatly appreciated.
Paul