Latency due to RTAS-plugins

[nhomme]

I am experiencing problems during mixing with latency when using several RTAS-plugins at the same time. I have one 'clean' track with a send to an aux track for reverb. The reverb track is delayed so much that there's no phase issues, but more like an echo.

I am using Pro Tools M-Powered 7.1 (I think) with a Delta 1010 with buffer size set to 1024 samples.

To compensate for the latency I've added delay to one track and manually adjusted until it sounds ok.

Is there any other way to compensate for the latency?

 

[bennychico11]

I am experiencing problems during mixing with latency when using several RTAS-plugins at the same time. I have one 'clean' track with a send to an aux track for reverb. The reverb track is delayed so much that there's no phase issues, but more like an echo.

I am using Pro Tools M-Powered 7.1 (I think) with a Delta 1010 with buffer size set to 1024 samples.

To compensate for the latency I've added delay to one track and manually adjusted until it sounds ok.

Is there any other way to compensate for the latency?

echo on a reverb track?? sounds normal to me


lol
anyway...no, there's not much you can do with latency. ADC (automatic delay compensation) is something we've been trying to push with Digi for LE for awhile. And despite what critics say out there, PT does compensate up to a point...as long as the delay is less than your buffer size. Any higher and it can't compensate.
What plugin are you using and how much delay is it inducing? You can Ctrl+click on the volume indicator right above the track name in the mix window to see what the delay is in samples. Some large plugins just induce a lot of latency and you'll have to work around it.
With 7.x now there is the time adjustor plugin which helps. Basically you add that on tracks that are behind in time (in your case the audio track).
The best way is just to print the reverb to a new track. Reroute the aux track to a new audio track and record that. Then disable the aux track so you still have it, but it's unusable. Then use the Edit->Shift (Alt + H) to move the newly printed audio back in the timeline.

HTH

 

[nhomme]

What plugin are you using and how much delay is it inducing?
HTH

I don't remember what plugins I use, but it's two kinds of reverb. The latency is somewhere between 70 and 80 ms.

 

[MessianicDreams]

sometimes when i'm using compressors or whatnot that give a decent amount of latency, but i don't want to print them because i'm not done mixing and will probably change them or whatever, i'll physically move the files back to make up for the compensation.

What i do is put PT into spot mode, then just shift the particular track back x number of samples. It's important to remember (or write down) which tracks you've moved, because if you decide to change plugs you'll need to put the track back to where it belonged!

 

[bennychico11]

I don't remember what plugins I use, but it's two kinds of reverb. The latency is somewhere between 70 and 80 ms.

two reverbs on one aux track at the same time? if so, try cutting it down to one

what's the sample rate you're recording at, and what is PT saying the delay is in samples (do the trick I mentioned above)
Reverbs are notorious for creating latency...and you may just have to correct it via the ways I mentioned.

 

[nhomme]

Thanks

what's the sample rate you're recording at, and what is PT saying the delay is in samples (do the trick I mentioned above)

Thanks for the tip!

I use two reverbs at the same time to compare and find which works best.

I recorded at 44.1. The delay is about 3000 samples. But instead of shifting the audio files 'physically' I inserted Digidesign RTAS TimeAdjuster on the track with the least delay. This worked perfectly, and I found this was the easiest way since I had several regions on the track, just in case I forget to move one or two regions and mess things up.

 

[Ford Van]

PT STILL doesn't do plugin latency compensation?

Sigh.............

Even $40 DAW software does plugin latency compensation!

 

[MessianicDreams]

PT STILL doesn't do plugin latency compensation?

Sigh.............

Even $40 DAW software does plugin latency compensation!

As mentioned in this thread, PT DOES DO LATENCY COMPENSATION!!!!!


it just has a limit, set by whatever your buffer size is (so max is 2048 samples of compensation).


what many people don't realise is the Digidesign are not just a software developer...they're also an interface developer. so they want people to upgrade their software and hardware to HD for more ADC..

 

[bennychico11]

Thanks for the tip!

I use two reverbs at the same time to compare and find which works best.

I recorded at 44.1. The delay is about 3000 samples. But instead of shifting the audio files 'physically' I inserted Digidesign RTAS TimeAdjuster on the track with the least delay. This worked perfectly, and I found this was the easiest way since I had several regions on the track, just in case I forget to move one or two regions and mess things up.

well, take one of the reverbs off!
If you're running two reverbs at once it's going to induce quite a bit of latency. If you need to compare the two, use Ctrl+Windows (or whatever it is on Mac) to disable the plugin...this will turn it off the plugin completely. Bypassing a plugin still keeps a delay (assuming that's what you're doing when comparing the two).

Also, when I mentioned shifting the regions...I meant you shift the printed reverb track. AFTER you've routed the audio through the reverb aux, and to a new audio channel where you have recorded it. This will record one long audio region and you just shift that single region....should be easy enough. It's a good habit to get into as the time adjuster plugin will create more delay with other audio tracks in your session.

 

[sixways]

maybe you should get reaper. when reaper falls into water, reaper doesn't get wet, water gets reaper.


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