Hello Gianmaria, Your problem here is that the postfixed [ adds an event the the note it is applied to. Now, this does not work with macros. In such cases you can do something like this
<< \ka s[ >> \kb << \kc s] >> So just apply the event to a simultaneous skip. Cheers, Valentin
signature.asc
Description: This is a digitally signed message part.
