Sending MIDI system realtime messages to vst~?


    Feb 21 2022 | 5:37 pm
    Is it possible to send a MIDI system realtime message to a vst~ object. It seems that the midievent message requires two arguments, while the realtime message is a single number. I'm trying to send 250 and 252 as start and stop/continue messages to a vst drum machine that plays back patterns. Using a transport syncs the clock, so I don't think I need to send 248. Thanks in advance, everybody.

    • Feb 21 2022 | 7:07 pm
      I am not aware of any specific way to do this other than to send those numbers out directly via a midiout object. As it is just a single byte then it might work. It's certainly worth a try.
    • Feb 21 2022 | 7:17 pm
      Have you tried sending these bytes directly to the vst~ object? Alternatively, can the VST be confirgured to respond to something else, like a note, control or sysex message?
    • Feb 21 2022 | 7:33 pm
      anything starting with an integer will be treated as VST parameter number.
    • Feb 22 2022 | 7:10 pm
      Thank you. This was an interesting path to check. Unfortunately, none of the drum machine vsts that I have assign a parameter to the start/stop function of the sequencer. I'm still at a loss for how to send a midi realtime message (250-252) to the vst~.
    • Feb 22 2022 | 7:18 pm
      Andrew, Thanks for the reply. Unfortunately, sending the realtime messages to a midiout object doesn't really help me. I need a way to send them into a vst~ object.
      Also, sending them directly to the vst~ inlet has no effect, either sending just the number (250) or prepending a midievent mssage to the number. Both ways are ignored. Just sending the number behaves like Roman's advice suggests. It tells the vst that you will be addressing a parameter of that number. The drum machines I have do not have exposed parameters for starting and stopping the sequencer. They are expecting the midi realtime messages.
      All daws support this functionality. Either Max does not, or I am missing something. The realtime (248) clock messages seem to be communicated "behind the scenes" through the Transport object. But I can't see where or if the start/stop messages are similarly communicated to the vst through the transport.
    • Feb 22 2022 | 9:36 pm
      Yes, I can understand your problem then.
      Have you tried submitting this to tech support? They might have an answer and if not, if you say pretty please, they might look at a way to add it in a future update.
    • Feb 22 2022 | 10:06 pm
      i am just guessing here, but have you tried sending "midievent 250 0"?
      some hardware devices would properly process the RTM byte and ignore the rest it does not understand.
    • Feb 22 2022 | 10:48 pm
      Roman, good guess but no luck. As I said, the midi beat clock (248) seems to be sent by the transport object "behind the scenes". But the Start/Stop messages cannot be sent to the vst~ object. I tried your suggestion, and I tried all sorts of combinations of starting and stopping the transport. But the vst~ always responds to the tempo changes of the transport, but not the stop/start. This seems like it shouldn't be this opaque.
    • Feb 24 2022 | 5:28 am
      which plug-in are we talking?