USB sysex issues

[Darryl]

I have a problem with the sysex buffer in that when I try and get bulk dumps back from old hardware synths it drops bytes. I can slow down the flow of midi bytes from soundquest to my hardware rack fine but I can't control how fast the TX81Z chucks back its data. It's 2500 ish bytes for a patch dump. How are people dealing with this? Being able to read in patch data is kind of a deal breaker.

Hello, we've got an updated firmware with completely reworked SysEx buffering, but we've not had time to thoroughly test it so we haven't shared it yet. If anyone wants to give it a try, I'll make a post with the firmware. I'm sure it won't hurt anything, we've been using it day to day for a while now. Look for my next post in this thread.

I'll warn though, that if you are doing a big SysEx dump, you probably will have to stop clock and any other MIDI traffic to prevent issues. Especially if you are merging inputs to the output of the device receiving the SysEx. 

All the best,
Darryl

Ok so I'm receiving sysex into the MRCC from a class compliant USB midi device (ESI M4U XL) then routing that back to the PC. The chain looks like TX81Z -> ESI M4U XL -> MRCC -> PC.

 I still have the same bug as before, midiquest is complaining of dropped packets. It works for smaller dumps. I know midiquest is capable of parsing the data from the TX81Z because when I plug the synth directly to the PC its fine. Bothe MRCC midi monitor and the midiquest monitor show no other data (clock or otherwise) coming in while I'm attempting sysex dump.

The new firmware hasn't fixed the problem sadly. Any ideas?

*EDIT*

I have tried TX81Z direct to MRCC front panel input and voice bank dumps work, I have tried TX81Z into M4UXL into PC and that also works. The problem only occurs when the sysex comes into the MRCC via the USB input. It is definitely a problem with the MRCC USB sysex, I don't think it's the M4UXL at fault as it works into the PC and its 100% class compliant.

Okay, thanks for narrowing it down to the USB host with a 2nd MIDI interface attached. It gives us something to try to replicate.