In the SongBook+ settings, you can configure whether a MIDI Start should be sent when a song is started.
With the "Actions on Start" button in the song's editing window, you can define any MIDI commands that should be sent when the song starts.
In the MIDI settings under "MIDI" -> "MIDI Macros" -> "Macros When Operating Songs," you can select a previously defined MIDI macro that will be sent when any song starts. Below, you can also specify whether it should be sent even if the song already has its own "Actions on Start."
SongBook sends the contents of a MIDI file as soon as a song starts, if a .mid file with the same name as the .pdf file, extended with "_start.mid," exists.
(e.g., MySong.pdf -> MySong_start.mid)
Only type 0 MIDI files (single track) are allowed. All commands are sent at once without considering timing. Thus, music cannot be sent, only commands to configure the environment.