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Old 11-23-2018, 08:19 AM   #1
mrlimbic
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Default Midi timecode slave mode does a strange thing

When reaper receives MMC locate (goto) when slaved sometimes it jumps to new location (as I would expect). However, sometimes it scrubs towards the new location.

Here is a demo video link below. reaper is receiving 5 seconds of MTC so it plays, then stops and receives 5 random MMC locates a second apart each.

Sometimes it jumps to the locate. Sometimes it scrubs to it. Why? Is this a bug?

http://vordio.net/wp-content/uploads...rd-HD-720p.mov
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Old 11-23-2018, 11:26 AM   #2
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Just to check -- do you have the same input enabled for MIDI control messages as well as for MTC synchronization?

There are two separate systems in play -- the MTC synchronization, and the MMC control going through the "MIDI control messages" side.

The MMC messages, when stopped, are treated similar to repositioning the cursor via control surface, which has some logic to determine whether or not a scrub is desired (how recently you previously scrubbed, how far there is to go, etc). You can change whether scrubbing is used at all in Prefs/Playback (near the bottom).

If you're seeing something inconsistent with that, maybe send me a .mid file of the actual messages being sent, plus details on how the device is opened/etc, and I'll take a look
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Old 11-23-2018, 11:39 AM   #3
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OK. I turned off scrub option which stops the unwanted scrubbing.

Now it occasionally does a weird multiple locate but only about 1 in 6 times.

So a jump of 10 seconds can look like it quickly jumps 3, then 3, then 4 seconds to make up the 10, rather than one big jump. So the video flashes a few different frames. But it is inconsistent. 5 out 6 times it does the expected single jump.

Any ideas?
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Old 11-23-2018, 12:05 PM   #4
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Quote:
Originally Posted by mrlimbic View Post
OK. I turned off scrub option which stops the unwanted scrubbing.

Now it occasionally does a weird multiple locate but only about 1 in 6 times.

So a jump of 10 seconds can look like it quickly jumps 3, then 3, then 4 seconds to make up the 10, rather than one big jump. So the video flashes a few different frames. But it is inconsistent. 5 out 6 times it does the expected single jump.

Any ideas?
I'll check my test case a bit more and create a midi file if I think the test is solid.

There seems to be inconsistency between playhead start position (MTC fullframe) and edit cursor position (locate) which may be my fault because even when I send MMC then MTC with same values the playhead doesn't always start at the edit cursor every time.
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Old 11-24-2018, 07:24 AM   #5
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Here is a video of reaper vs jadeo both slaved to same midi source.

There are occasional inconsistencies in the video (but mostly correct) yet timecode display is almost always different. Sometimes reaper seems to play a game of catch up quick.

http://vordio.net/wp-content/uploads...consistent.m4v
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