Furnace 0.6.8.3, Arch Linux [Keil.fc](https://github.com/user-attachments/files/21614450/Keil.fc.txt) (remove the .txt suffix) It should sounds like: https://www.youtube.com/watch?v=Ol_iXDF6wLU [NostalgicPlayer](https://github.com/neumatho/NostalgicPlayer) has a correct implementation.