Midi "file format" does not support playup or record over specific ports.
I am doing a sequenser, that will extend record and playup over multiple ports which i think is more common today then chaining "how do you chain a USB device...".
Should i just have a format that assign a port to the recorded / playedup events on ->tracklevel "it seem crazy to have on eventlevel in format?" and have some mode that default them to statndard port "whatever that may be...."?
The port on tracks could be added to events during the mixdown before playup?