Sent from my iPhone
> On 26. May 2018, at 11:12, Alexandre Ratchov <[email protected]> wrote: > >> On Sat, May 26, 2018 at 12:10:03AM +0200, Sebastian Reitenbach wrote: >> Am Freitag, Mai 25, 2018 22:22 CEST, Alexandre Ratchov <[email protected]> >> 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 <[email protected]> >>>> 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? Don’t know, I need to dig out an unused notebook and install some Linux on it. Sebastian
