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laurena4683224
laurena4683224
Participant
July 7, 2020
Question

Loud interference at edit points - Unable to Solve!

  • July 7, 2020
  • 1 reply
  • 426 views

Hi all,

 

I've just migrated from Protools to Audition and am having some teething problems.

 

I've got a track which has needed a fair bit of RX to clean it up (Voice De-noise, De-hum, De-Click). I've also used some native plugins (DeReverb, multiband compression, Graphic EQ 10 band).

 

Auto fade's enabled so I'm expecting a seamless transition from one cut to the next but instead there's a surge of untreated audio at each edit point, creating a series of interruptions. They range from sounding like electrical surges (presumably from the ground loop which appears on the untreated track) to harsh mic bumps.

 

I assumed this was a latency issue so tried pre-rendering the track, but this didn't solved the issue. I hoped it might be bug which would right itself on export, but the .WAV is exactly the same.

 

Does anyone have any ideas about what could be causing this / how to fix it? It's not something I've ever encountered in PT.

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1 reply

SteveG_AudioMasters_
Community Expert
SteveG_AudioMasters_Community Expert
Community Expert
July 7, 2020

Unlikely to be a bug (we'd have spotted that pretty rapidly) and latency only affects the way the output gets to your sound device - if it's set too low then you'll end up with 'interrupted' sound, but not clicks and pops. There's no way that Autofade between clips can eliminate anything that happens at the very end of a clip - it will only have its level halved at the crossover point. So what else?

 

First thing to look at is in Preferences>Data. At a bare minimum it needs to look like this:

If you turn either of the first settings off, then you are very likely to have any edit where the crossing points don't line up coming out with a discontinuity, which in a bad case can be like an explosion. If this doesn't make any difference, then if you could post a small example, it might be a lot easier to establish exactly what's happening.

laurena4683224
laurena4683224Author
Participant
July 8, 2020

Hi Steve,

 

Many thanks for this. My settings are as above so that's not it.

 

I've attached a clip - you should hear a few different sounds where the cuts are, ranging from surge like sounds to bumps: https://we.tl/t-5C2hAtYLA9

 

This is what it looks like in the timeline (suspiciously free of auto-cross fades....!):

 

 

 

 

 

 

 

 

 

 

 

I've been playing about with the effects on Jill's track and it feels like there's something going on with cuts and the processing on the Dehum RX plugin. I'm wondering if RX senses the edit point, stop the processing a millisecond before the cut, resulting in a tiny segment of untreated audio - is this possible? 

 

The only way I can think of remedying the problem is processing Jill's audio in RX before re-importing into Audition.

SteveG_AudioMasters_
Community Expert
SteveG_AudioMasters_Community Expert
Community Expert
July 8, 2020

Mostly what I can hear here is poor mic technique, which is what's causing the low frequency 'bumps' - that's blast noise, which gives you the popping 'P's. What happens with DeHum is that you have to be very careful with it - if you use too steep a notch, you can make the hum sound worse, not better (there's a complicated explanation for this that I won't bore you with), but the upshot is that the hum is perfectly capable of being modulated by the speech - which is what it sounds like in your case. It's not actually sensing the edit points, but it is reacting to the content...

 

Basically you should only use the DeHummer when you're absolutely desperate; Noise Reduction generally does a better job. And yes RX is pretty powerful stuff - rather easy to abuse without realising it! The popping 'P's are relatively easy to remove in Audition. Once you've learned how to spot them in Spectral view, you can generally get rid of them with the AutoHeal favourite. As for processing in RX before importing - well that's what I always do, if I need to.

 

Can you post a small section of Jill's audio as recieved? Preferrably as a wav file. I can probably give you a clearer idea of what you might be able to do with it to improve the problems.

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