The wait type specifies a point where the accompaniment should wait for a performer event before continuing. This typically happens at the start of new sections or after a held note or indeterminate music. These waiting points cannot always be inferred reliably from the contents of the displayed score. The optional player and time-only attributes restrict the type to apply to a single player or set of times through a repeated section, respectively.
The
<wait>element.The wait type specifies a point where the accompaniment should wait for a performer event before continuing. This typically happens at the start of new sections or after a held note or indeterminate music. These waiting points cannot always be inferred reliably from the contents of the displayed score. The optional player and time-only attributes restrict the type to apply to a single player or set of times through a repeated section, respectively.
See
https://www.w3.org/2021/06/musicxml40/musicxml-reference/elements/wait/