tool to create sound: https://onlinesequencer.net
happy birthday mid: https://onlinesequencer.net/3679968
for high speed ball, we should export it to .wav(8bit)
You can use other sound editing like FLstudio or others online tools
0:00 - 1:40 : contact listener
1:41 - 4:18 : create sounds
4:18 - 5:46 : coding sounds.py