MTC generator on Isadora (Master)

jhoepffner

Hello,

At the moment, there is no possibilities to send MTC from Isadora. You can have a quite precise SMPTE message made from position (there is some example of User Actors from Michel or me on the forum) that you can send by OSC, you can try by Sysex, here is the link to the MTC protocol…

http://www.electronics.dit.ie/staff/tscarff/Music_technology/midi/MTC.htm

But anyway, the normal way is to use the sample accurate application, DAW with word clock etc. to send MTC to the frame accurate applications like Isadora.

Even in Max/msp, there is no good implementation of MTC…

Jacques

Fred

Or try this

https://sononum.net/horae

jhoepffner

Hello,

Just for the fun (and to exercise my coding) I made a try to send MTC from Isadora, it works for locate but not completely for running MTC.

Fell free to finish it…

But reading the Max forum concerning it, I think is a very difficult task.

Jacques

6d236c-receipt-tc.izz

jsukjin

Thank you guys.

I have figured out this isssue with Maxmsp.

Since my purpose of getting MTC is to sync Isadora with lighting system.

I created MTC generator using Maxmsp and built a kind of bridge patch

between Isadora and Maxmsp using Osc.

so when a video is being played. the frame information is sent to Maxmsp via osc.

the Max creates timecode (quarter frame message) and the frame information is again sent

to the Isadora. then Isadora calculated it as timecode information to display.

the reason why i did that is the timecode information that Isadora gets and the Maxmsp gets

are not accurate ( 8~12 frames difference randomly) perhaps due to the latency.

thank you very much for you help

thanks.

olialonso

Hi jsukjin

Have you tried with dmx?

olialonso

DusX have a dmx actor

it works very well

Fred

I would go by using LTC and converting LTC to MTC from something like Lockstep

https://figure53.com/lockstep/

You can send the MTC to any other software, and you can play the LTC as an audio track on a movie in Isadora.

mark

+1 to what @Fred said. That's a really good solution.

jsukjin

Thank you all.

I have done this job as a company project. Since every software that communicate with Isadora are windows based, I can not go for an app like lockstep.

I have overcome this issue using Maxmsp. basically I have created an app that generates MTC value on Maxmsp. Then I have made my Isadora session file communicate with the app via OSC so that they are synchronised. The MTC generated by the app is sent to the lighting PC via network MIDI driver.

Therefore I achieved what I would like.

Even though my method is not 100% accuracy, it is good enough for lighting memory task.

Thank you all.

Fred

Just a few updates, a lot of MOTU interfaces can do LTC to MTC conversion natively:

[http://motu.com/techsupport/technotes/document.2000-06-23.9120132924](http://motu.com/techsupport/technotes/document.2000-06-23.9120132924)

And for super duper hardware versions check these LTC to MTC convertors out

[http://www.horita.com/smpteLED.htm#TR-100](http://www.horita.com/smpteLED.htm#TR-100)

[http://www.kissboxus.com/product-p/tc2tr.htm](http://www.kissboxus.com/product-p/tc2tr.htm)