Am Samstag, Mai 26, 2018 11:12 CEST, Alexandre Ratchov <a...@caoua.org> schrieb:
> On Sat, May 26, 2018 at 12:10:03AM +0200, Sebastian Reitenbach wrote: > > Am Freitag, Mai 25, 2018 22:22 CEST, Alexandre Ratchov <a...@caoua.org> > > schrieb: > > > > > On Fri, May 25, 2018 at 10:22:26AM +0200, Sebastian Reitenbach wrote: > > > > Hi Alexandre, > > > > > > > > Am Freitag, Mai 25, 2018 08:41 CEST, Alexandre Ratchov <a...@caoua.org> > > > > schrieb: > > > > > > > > > On Fri, May 25, 2018 at 12:21:18AM +0200, Alexandre Ratchov wrote: > > > > > > > > > > > > Maybe, but unlikely. If the device attaches, generally it works. > > > > > > Show > > > > > > what's received on midi2 when you type on the keyboard or do any > > > > > > other > > > > > > simple actions. > > > > > > > > > > > > > > > > fwiw, here's a small utility that I use very often to debug & connect > > > > > MIDI ports. > > > > > > > > > > http://caoua.org/alex/obsd/midicat.tar.gz > > > > > > > > > > To connect two rmidi/2 -> rmidi/1 and dump the data on stderr, run: > > > > > > > > > > midicat -d -q rmidi/2 -q rmidi/1 > > > > > > > > Actually, that midicat seems to do the trick. When I run it in debug, > > > > and press some keys on the > > > > system-1, output looks like: > > > > > > > > f8 > > > > f8 > > > > fe > > > > f8 > > > > f8 > > > > f8 > > > > 90 80 9b > > > > > > ^^^^^^^^^^^ > > > > > > these 3 bytes make no sense. The status byte 0x90 is correct but the > > > two args are wrong. This is when you pressed the key, right? > > > > > > > ... > > > > 90 9b b2 > > > > > > These are also wrong, and this is when you released the key, right? > > > Interestingly the 0x9b is repeated. > > > > > > > f8 > > f8 > > f8 > > 90 80 34 > > 90 40 f8 > > ^^^^ released key > > This one is cleary wrong. 0x90 must be followed by two numbers in the > 0..0x7f range. > > > > > > > Clearly, the midi events are corrupted by the usb interface. Does the > > > midi interface claim to be "class compliant"? does it come with > > > drivers for MacOS or Windows? > > > > It was advertized as class compliant, and it just came the cable, no > > drivers. > > But as I said, it was el-chepo from ebay not even 3 EUR incl. shipping from > > China. > > > > do you know if it works on other operating systems? got Ubuntu installed on a notebook, installed lmms, connected the system-1 to it via MIDI-to-USB. Similar as under OpenBSD, some notes don't play, others have wrong pitch, or only play after second or third push of the note. Thanks for all the hints, but in the end at least that cable seems to be just broken. Sebastian
