Hi :) it's not funny to read about the hardware side of MIDI for Windows and Linux PCs :(.
A friend, also a former developer for Brauner, but in addition an digital electric specialist, now is involved to the technical issues of MIDI for my computer. We did researches and it seems to be that USB, from the technical side, is much better than gameport MIDI and sound card MIDI. Btw. the diode that is upside down to the opto-coupler diode at some MIDIinterfaces, seems to eliminate the positive side of the electric wave, to get a better slew rate for the negative side, because MIDI seems to use the negative side only. I'm not sure, but it might be possible, that if the slew rate is less square, but more like a sawtooth or sinus, the opto-coupler transforms the information not at the top of the wave as a signal, but earlier, maybe at the middle of the wave. I don't know if this would be noticeable as jitter, I don't think so, but maybe several hardware issues added, can cause jitter. Anyway, sync doesn't be a problem by the software side only, the hardware (not only chip sets for mobos) seems to have a lot of impact. This are still half-truth or absolute false information, the research still goes on ;). Roland shall invented the MPU401 because of sync issues. It might be that MIDInterfaces from the 80ies are simply better hardware, than MIDI interfaces today. I have 40 1N4148 diodes on stock and will take a look, if my swissonic USB device is using 220 ohm resistors and diodes or if they ignore this (assumed that I'm able to open the case without damaging anything). Btw. the USB MIDInterface isn't able to trigger every external MIDI device, it has less power. Cheers, Ralf _______________________________________________ 64studio-users mailing list [email protected] http://lists.64studio.com/mailman/listinfo/64studio-users
