add_text (Audio_text::TRACK_NAME, "control track");
add_text (Audio_text::TEXT, "creator: ");
add_text (Audio_text::TEXT, id_string);
}
add_text (Audio_text::TRACK_NAME, "control track");
add_text (Audio_text::TEXT, "creator: ");
add_text (Audio_text::TEXT, id_string);
}