[Jsynthlib-devel] Flaky MIDI interfaces...

[Joe E. <jo...@em...>]

I'm working on a driver for the Digitech DSP 256XL and I ran into a 
curious problem.

When I tried receiving a bulk dump from the device, I'd usually get a 
few dropped bytes. At first, I suspected that it was something wrong 
with the Digitech, but I tried it on another DSP 256XL and got the same 
results.

Then, I suspected that it was something wrong with the Linux drivers for 
my Roland UM-1 and/or the Java support for MIDI in JDK 1.5 on Linux. So, 
I tried running Windows XP with and using a C++ sysex send/receive 
program... and got the same results. Finally, I tried using the C++ 
sysex program with Windows XP using my MOTU MIDI Express XT, instead of 
the Roland UM-1... and *then* I got consistent sysex sizes.

So, now, I suspect that the Edirol UM-1 is a little flaky. Has anyone 
else experienced corrupt sysex dumps with any of the "cheaper" MIDI 
interfaces (like Soundblaster or UM-1 or MidiMan Uno)?

- Joe