Nugen ISL - still ISPs?
Old 7th May 2013
  #1
mymixisbetterthanyours!
 

Thread Starter
Nugen ISL - still ISPs?

So I just tried the NuGen ISL demo on a project.
When setting 0.0dB input gain and -0.1TPlim (LookAhead 2ms, release 10ms), I still get ISPs when checking with afclip.

Any idea?
Old 7th May 2013
  #2
Quote:
Originally Posted by kosmokrator View Post
So I just tried the NuGen ISL demo on a project.
When setting 0.0dB input gain and -0.1TPlim (LookAhead 2ms, release 10ms), I still get ISPs when checking with afclip.

Any idea?
I don't experience any ISP leakage with ISL.

- Is ISL the last plug-in on the master bus?
- Are the stereo out and master faders set to 0.0 dB?
- Are you using normalize during bouncing? Don't.
Old 7th May 2013
  #3
mymixisbetterthanyours!
 

Thread Starter
[QUOTE]
Quote:
Originally Posted by Simon Morrison View Post
I don't experience any ISP leakage with ISL.
Quote:
- Is ISL the last plug-in on the master bus?
Yes
Quote:
- Are the stereo out and master faders set to 0.0 dB?
Yes
Quote:
- Are you using normalize during bouncing? Don't.
No.
Old 7th May 2013
  #4
- Are you dithering during bouncing?

One way to confirm an ISP leak would be to put a True Peak meter after ISL.

I measure dBTP with ToneBoosters EBULoudness - a very accurate meter.

FYI - I am using the 64-bit AU version of ISL in Logic Pro.
Old 2 Weeks Ago
  #5
Gear nut
 
SonicLegacy's Avatar
what format is your output file? if its mp3, then the clipping is probably happening during the conversion process. reduce the limiter output to -1.0 dB
and you should be fine.
Old 1 Week Ago
  #6
FYI - ISL version 2.0 is now available.

From the press release: "ISL's new Dynamic Auto-Release mode enhances algorithm transparency by intelligently adjusting recovery for low-frequency content. Unique channel linking visualizations and interdependency controls make ISL 2 an unprecedented solution for a new generation of production requirements."
Old 1 Week Ago
  #7
Lives for gear
 

True peak is not an absolute quantity since the number you get is dependent on the method employed to perform the calculation. The ITU recommended technique is to oversample the waveform 4X, but no one is beholden to that. It's just one way of synthesizing the number. Apple doesn't specify how they are making the calculation in afclip, and they could be doing something slightly different than ITU based calculators, like the Nugen module.

If you keep peak levels a couple of dB down from full scale as has been recommended then it is a moot point anyway, because -2 dBTP and -1.9 dBTP both well below full scale.
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