By size, are we talking the length of the recording, or the throughput? Because as far as I can tell there is no MIDI being received at all when I tell the device to transmit. The process lasts about two or three minutes by the way.

Would altering jack settings make any difference? Can I use one of the drivers other than firewire?

---- On Tue, 09 Dec 2014 19:54:03 +0000 Paul Davis <paul@linuxaudiosystems.com> wrote ----

On Tue, Dec 9, 2014 at 2:29 PM, oli_kester <oli_kester@zoho.com> wrote:

Does JACK MIDI not support sysex at all?

There is a size limit, not a message type limit.