As was said: a hidden 18:8e tuplet.
The beam extension is done by writing one more eighth, beaming it to the others, and then hiding its notehead and stem. If you want, you can suppress playback for the (hidden) helper note.
As was said: a hidden 18:8e tuplet.
The beam extension is done by writing one more eighth, beaming it to the others, and then hiding its notehead and stem. If you want, you can suppress playback for the (hidden) helper note.