I think I've found the issue: the portmidi version used in Pd vanilla throttles the data rate on macOS, while the older version used by Pd extended 0.43 doesn't! I'll post more details on GitHub. I think my suggestion of spreading your messages across several ticks will help.
Christof > Gesendet: Sonntag, 05. Mai 2019 um 11:40 Uhr > Von: "cyrille henry" <c...@chnry.net> > An: "Christof Ressi" <christof.re...@gmx.at>, Pd-List <pd-list@lists.iem.at> > Betreff: Re: Aw: [PD] pd-lork and midi on osX > > hello, > > Thanks for looking at this problem. > > The test patch is very similar to my situation. > I use a DMX interface that is visible by a computer as a midi device over a > USB connection. It allow to control lighting device from any musical software. > This interface use class compliant usb/midi driver and control 2 dmx univers > (i.e 1024 lighting devices) > > a DMX frame is about 20ms. So I need to send 1024 value every 20ms. > 10 years ago, windows drivers did allow only 1 midi message every ms, so it > was not possible to use this interface on windows. But I was working fine on > osX and linux. > I did not test on windows since. It still work on linux. It works on > pd-extended on osX but not with pd vanilla 0.49 on osX. I did not test any > other pd version on osX because I don't have a mac at home. I'll make more > test in few weeks. > (when I says that it did not work, I mean that you can't send 1024 value > every 20ms, but you can send 100 every 20ms) > > If you try my test patch with a USB/MIDI interface, you will face problems : > midi is to slow, so pd will hang or data will be lost. > You should only use this test patch with something that can receive midi that > fast : a virtual port, or a hardware that did not convert this data to midi > informations. > > I will try sending 50 messages every ms, but "almost gone" is not satisfying. > > cheers > Cyrille > > > Le 04/05/2019 à 03:11, Christof Ressi a écrit : > > Hi, I don't know what your actual patch looks like, but I noticed that when > > I spread the MIDI messages evenly by sending 50 messages every 1 ms instead > > of 1024 every 20 ms, the delay on my USB interface is almost gone. Maybe > > this improves your situation. The real problem, however, is that sending > > MIDI on Windows and macOS via portmidi is currently a blocking operation > > and this has to be fixed. > > > > Christof > > > > > >> Gesendet: Freitag, 03. Mai 2019 um 10:19 Uhr > >> Von: "cyrille henry" <c...@chnry.net> > >> An: "pd-list@lists.iem.at" <pd-list@lists.iem.at> > >> Betreff: [PD] pd-lork and midi on osX > >> > >> Hello, > >> I'm trying to find a solution for my project where large amount of midi > >> data should be send. > >> This bug prevent me to use latest vanilla : > >> https://github.com/pure-data/pure-data/issues/581 > >> and I want to avoid using pd-extended. > >> > >> The final project will run on osX, but I don't have a computer to test on > >> this platform. > >> Can someone tell me if pd-l2ork will do a better job at sending midi data > >> at fast rate? > >> > >> thanks > >> Cyrille > >> > >> > >> > >> _______________________________________________ > >> Pd-list@lists.iem.at mailing list > >> UNSUBSCRIBE and account-management -> > >> https://lists.puredata.info/listinfo/pd-list > >> > > > _______________________________________________ Pd-list@lists.iem.at mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list
