A major 3rd firing interval Inline 9 I made and researched. Learn more in the YouTube video description on the site. ...

A perfect 4th firing interval Inline 7 I made. Learn more in the YouTube video above. Modified on 8/29/25.

A perfect 5th firing interval inline 5 I made. Learn more in the YouTube video above. Modified on 8/29/25.

More details and credits in the YouTube video description. Modified on 8/29 for additional realism.

See more about it on the YouTube video description. Modified 8/29 for additional realism.