Old 06-01-2018, 11:24 AM   #1
ALex1973
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Default Automation Issue with Send Volume/Pan

I have a problem I just cannot understand, I hope you guys have an explanation, or even a solution! This is my problem:

I have a Novation Impulse connected to my PC via USB using Reaper 5.965 X64.
On my Impulse there is a Nord Lead 2 connected via the MIDI INPUT. This is possible, because the Impulse has a built-in MIDI interface.

I don't use Automap and assigned all faders and knobs via 'Actions'.
Fader 1-8 are assigned to control Volume Faders of Track 1-8 and they work just fine. They are all very responsive.

Fader 9 (CC#49) is assigned to 'Automation Lane: set active fader (MIDI CC/OSC only). This is a great idea, so I can use Fader 9 to write automation over MIDI. It works in Trim/Read mode, however... as soon as Automation Mode is set to Write or Touch it introduces an annoying delay between moving the fader and the actual response. It is getting slow and jerky and this is also perfectly visible when I click on 'Sends' on the Track. The fader jumps around.

Now, when I assign a knob from my Nord Lead 2 to 'Automation Lane: set active fader (MIDI CC/OSC only) there is no problem at all! The fader remains very responsive, also in Write- and Touch mode!

The faders on the Impulse are set to CC and send values from 0-127.

I compared the difference between the two MIDI outputs in MIDI-OX, but could not see any strangs things happen.

So why does Reaper has this terrible delayed, jerky behaviour when I assign a fader to 'Automation Lane: set active fader (MIDI CC/OSC only) when I want to control 'Send Volume' or 'Send Pan'?

And why doesn't the problem doesn't occur when the Nord Lead 2 is been used instead of the MIDI output of the Impulse.

I tried to solve the problem by connecting my Impulse to the MIDI input of my HDSPe AIO, so no USB connection was used, but nu luck.
There is a technical difference between the MIDI CC's of the Impulse and the Nord Lead 2, but I really can't find out what the heck is going on.

Please enlighten me!

Last edited by ALex1973; 02-02-2019 at 04:15 PM.
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Old 06-13-2018, 04:43 PM   #2
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Default Solved!

Solved the problem... I put my graphics card in a different PCIe slot, which according to the manual was better for grapics cards.

The latency is gone, works perfect now! Now I can dub like a pro! :-D

The strange thing is that with the Nord Lead 2 as a controller the problem didn't occur before....... weird....
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Old 01-10-2019, 07:58 AM   #3
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Hmm.. problem NOT solved!

The problem is gone when the project is empty. Then there is no delay.
As soon as the project becomes 'fuller' with MIDI and audio tracks the delay is there on the Sends.

Tried a different videocard, no succes.

I also have a U-Control UC-16 connected to my pc, also the same problem.
As soon as I use the Nord Lead 2 (which uses the MIDI interface of the Impulse) there is NO delay.

What the heck is going on?
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Old 01-29-2019, 01:36 PM   #4
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Is there really nobody who experiences this problem?

I also have an Evolution C-25 MIDi keyboard connected to my pc and the problem doesn't occur when using this.

Last edited by ALex1973; 01-29-2019 at 02:55 PM.
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Old 03-12-2019, 01:16 PM   #5
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*Bump!*
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Old 03-13-2019, 03:01 AM   #6
J Reverb
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Try transmitting on a different midi channel from your Impulse faders for sends/pan.
Also using a different midi bus in Reaper can help for CC data.
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Old 03-13-2019, 05:51 AM   #7
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No, that doesn't help either...

Even if you use Empty Items to 'fill up' 4-5 tracks the problem occurs.

Attached a simple project where the problem occurs.
Just assign a CC to Automation lane: Set active fader (MIDI CC/OSC only) in Actions and move the knob or slider and watch how Reaper responds...
Attached Files
File Type: rpp Automation Lag.rpp (42.3 KB, 11 views)

Last edited by ALex1973; 03-14-2019 at 08:22 PM.
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Old 03-13-2019, 02:36 PM   #8
J Reverb
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Confirmed here.
Just tested with fresh project.
Latest pre-release.

Erratic jumping behaviour on send volume envelopes even without midi cc/osc assigned.
This doesn't happen on track volume envelopes.
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Old 03-14-2019, 12:30 AM   #9
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I installed the first release of Reaper v5 and the problem is also there from the beginning.

I use Windows 10, tried Windows 7 but also the same problem.

- Problem is gone when I set timebase to minimum, but then you can't see the media items in the TCP, which is useless.
- When I enable 'Faster Text Rendering' in Preferences\Appearance the jerky/delayed behaviour becomes a bit less obvious, but is still noticable.
- The smaller I make the Reaper window itself, the less obvious the problem becomes.

So somehow it also seems to be a graphic (render) related issue.

Last edited by ALex1973; 03-14-2019 at 12:51 AM.
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Old 03-17-2019, 04:16 AM   #10
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Can a developer confirm this bug? Will it be fixed?
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Old 04-07-2019, 12:54 PM   #11
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*Bump!*
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