Hi, I am currently working on the keyboard project (#7) in the official arduino starter kit. However, with 3 out of the 4 keys the sound turns on and off quickly when I hold the button (sound is not constant). I changed all resistors and wires but I am still getting the same effect. Then I saw the video by Massimo Banzi doing the same project and he is also getting the same effect when pressing the higher frequency button. Here is the link to the video:
(skip to 6:30 to just hear sounds
). Why is this? Is it fixable? I attached my code just in case although I checked it several times. Thanks.