Forum

Sending MIDI Clock

vvvv beta general
#1

I created a patch uses an LFO and a TogEdge to drive the MIDIShortOut sending message 248(decimal) which is the MIDI clock signal.

MIDI clock is a MIDI message that is sent 24 times for each quarter note (in other terms for each beat.)

A MIDI clock slave counts the number of Clock messages in a given minute (well, some fraction of a minute, but for simplicity’s sake, let’s call it a minute,) and divides that count by 24 to get the Beats Per Minute (BPM.) ( as a note, some slaves seem to ditch 23 messages and only count the 24th.)

Here’s my problem. The existing MIDI tools send continously while enabled at what I assume is their max speed (on my computer.) This equates to a steady 1800 messages a minute (30/sec) resulting in a MIDI clock signal equivalent to 75 BPM. I can’t get it to go any faster and I need to be able to reliably send in the 160 BPM range.

Here are my questions:

  1. Is there a way to use any existing MIDI tool in vvvv in a one shot rather than continous mode?
  2. Is there a way to use any existing MIDI tool in vvvv to send at a rate higher than 30 messages/sec? (yes, I know this is computer dependent, but I’m using a 2.4GHz machine already.
  3. Is there an existing MIDI clock (send) solution in vvvv?

The eventual goal, which may not be feasible at this time, is to gen up a tool to convert audio->MIDI Clock to drive the BPM count on my Edirol V-4 off an audio line feed or mic. The beat detection stuff seems fine in vvvv, it’s generating a well formatted MIDI signal that’s stumping me.

Thanks,
poprivet

#2

hi
I just can say that actually there is no node to generate a midi clock…
BUT a node create by tonfilm is already finish for the next beta
The next beta will be avaible soon

#3

btw.: poprivet is a pretty cool username…

#4

Thanks. My lifestyle involves a lot of hot-melt glue, duct-tape and poprivets ;-) (both literally and figuratively.)

I have deferred the problem by determining that the shareware DJ tool, djDecks (http://djdecks.be $30USD EUR27) will take an audio signal from an ASIO source, calc BPM and output it as MIDI Clock. It’s a wonderful tool for this purpose.

Now I’m engaging in a broader voyage of vvvv discovery. This is an astonishing tool. I’ve worked with a LOT of graphical programming environments and the performance, robustness and flexibility here blow me away. I work on the OpenTZT VJ tool SourceForge project (as VJ WYSIWYG/tdeagan) and am now really thinking hard about hooking the vvvv output into it (it’s a DirectX based tool as well.)

cheers!

#5

That was me being too dense to login before replying.

#6

the node sanch meant was the MidiClock (Devices) node, but its only an input. right now, there is no good way to send a midi clock from vvvv.
the best place for it would be midi sync support for the Timeliner plugin…

#7

i once considered using/improving the Beatdetection module(s) that float around here, but since have gone the hardware route to save processing power: the redsound soundbite micro device works quite well and midiclock is routed via my midicontroller to vvvv/MidiClock node… beat synched visuals rock!
only thing: i noticed strange behaviour with the beat type and beats per measure pins, but that may be due to my at that time still shaky setup…

© vvvv group