Hi, I'm wondering what the size limit is for SysEx messages in the JACK MIDI and ALSA sequencer APIs. My observations so far: In JACK MIDI, a SysEx message can be as large as the MIDI port buffer, which in turn has the same size as an audio buffer for one period. This is assuming that there are no other events transmitted on the same port during the same period. Is this correct? Or are applications somehow expected to handle larger SysEx messages split over multiple periods? In the documentation of the ALSA sequencer API, I couldn't find any mention of an upper limit. Some sources suggest that ALSA splits SysEx messages into chunks of 256 bytes, but from my own attempts at sending larger messages, it seems the limit is actually somewhere around 5500 bytes. Unfortunately ALSA doesn't seem to report an error when I try to send larger chunks, instead the messages just disappear. Can anyone shed some light on how to handle larger SysEx messages correctly? Thanks, Dominic