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Airwindows PurestGain: AU, Mac and PC VST
Old 6th December 2018
  #31
Quote from some one named Raven, on your website:

"Am i right in saying it makes things sound a little cleaner than it was even when it is just nudged up or down a touch? (default settings assumedly makes it bypassed)"

I figured you are more inclined to answer, here. I saw the question, and I was wondering what your answer is. My thoughts were that its probably no. Purestgain is just the most clean gain plugin system, except for BitShiftGain.

Suggestion: make it possible for other users to reply to comments on your website -- and have emails sent out if/when they do get replied to. I think a lot of people don't use the plugins forums. That way, somebody like me (or others, who know your plugins better than I do) could help by posting replies to people on your site, when ever its necessary.

Another option could be to have something near the header of your site, saying that you reply to things on gearslutz and other forums, but not on youtube or your site.
Old 10th August 2019
  #32
Gear Head
 

Hi Chris, hi guys sorry to necro this topic but I'm looking for the best possible technical usage of PurestGain in regard of gain staging with a VI that has its own internal volume/gain knob.

Which of the below methods would you regards as the ideal ultimate gain staging formula?

A:
1. Load the Virtual Instrument/Plugin and set its volume to the maximum possible output (To get the best possible resolution)
2. Leave the DAW's fader at 0 dB
3. Use PurestGain for bringing it down

or

B:
1. Load the Virtual Instrument/Plugin
2. Leave the DAW's fader at 0 dB
3. Set the gain from the VI's internal volume knob (And not use PurestGain at all).
Would I lose quality or limit resolution when only using the VI's internal gain for bringing the volume down, sometimes to a minimum barely hearing the sound? Would PurestGain preserve more information and signal integrity when lowering the volume to extreme settings barely audible?

PurestGain is indeed the cleanest gain plugin available which I'm using always on audio tracks. I've done nulltests and it beats almost any DAW's gain fader. Kudos for that!

Thanks in advance much appreciated!
Old 10th August 2019
  #33
Airwindows
 
chrisj's Avatar
Quote:
Originally Posted by branscobe View Post
Hi Chris, hi guys sorry to necro this topic but I'm looking for the best possible technical usage of PurestGain in regard of gain staging with a VI that has its own internal volume/gain knob.

Which of the below methods would you regards as the ideal ultimate gain staging formula?
Since you are working in what's certainly a floating point system (otherwise you wouldn't be able to use these plugins at all) it makes no sense to set the VI's output as loud as possible. It won't help and does nothing useful. If you're dealing with internal gain trims, in the absence of being able to defeat the gain processing, your best bet is to treat the internal gain trim as if it is a BitShiftGain.

All that is, is an ordinary gain stage guaranteed to change only the exponent of the audio's 'number', never the mantissa. 6 dB increments are the way to do that.

Since you're not guaranteed that '6 dB' on the VI will necessarily be exactly right (it might be, or it might be a bit off) your best bet is to give the VI unity gain. That's a 0 db change, or multiplying by 1.0: not perfect (it still involves forcing floating-point stuff to be multiplied by a value in the 1.0 range, which can zero out extremely quiet samples) but as clean as anything BitShiftGain can do.

Also remember: maybe you're not really hearing the benefits of PurestGain all the time, it's designed to work on a subtlety level that is NOT human-grade obvious. But this stuff adds up, and it's okay to care about that. I prefer that people not say this stuff is night-and-day obvious: I think of it as 'once in a while you'd notice the lack of it and be frustrated, or just have a moment of auditory enjoyment that would otherwise be blurred'.
Old 12th August 2019
  #34
Gear Head
 

Thanks Chris, I very appreciate your thoughts on this. What I get from your comments is that not using the VI's internal gain function is the safest way to ensure max quality, instead using BitshiftGain for -6dB steps or PurestGain for variable dB values.

Do I assume correctly it's the same concept for trimming as well as for adding gain? i.e. What would you suggest for VI Presets that have the internal gain knob set at unity gain and STILL have a very low output volume: Ideally use BitshiftGain/PurestGain? Or using its internal volume knob to bring up the output volume (force more info from the source)?

That would be interesting to know, thanks for your time!
Old 12th August 2019
  #35
Airwindows
 
chrisj's Avatar
Quote:
Originally Posted by branscobe View Post
Thanks Chris, I very appreciate your thoughts on this. What I get from your comments is that not using the VI's internal gain function is the safest way to ensure max quality, instead using BitshiftGain for -6dB steps or PurestGain for variable dB values.

Do I assume correctly it's the same concept for trimming as well as for adding gain? i.e. What would you suggest for VI Presets that have the internal gain knob set at unity gain and STILL have a very low output volume: Ideally use BitshiftGain/PurestGain? Or using its internal volume knob to bring up the output volume (force more info from the source)?
You can certainly use BitShiftGain to bring up output pretty much from anywhere, no matter how low the output, losslessly. That'll only change the exponent, so that's the closest thing you can get to perfect gain boost in the box (in a floating point system of any kind).

If you're going to adjust in finer than 6dB steps, there's no reason you couldn't just use PurestGain by itself to add a bunch of gain and then dial in the fine detail. If it's a very large change, larger than PurestGain alone would do, you could use BitShiftGain followed by PurestGain and it'd be fine. (all this is at a level of detail where it will never be that big a deal, but you're looking for 'best' answers so I'm giving them)

In general, whatever the level of the VI, you're probably best off leaving its internal gains all at unity gain, where possible.
Old 13th August 2019
  #36
Lives for gear
Chris, PurestGain has been daily in use here. Thank you for that! And load of other great things you've made! I have a smallish request though.. To fully implement PurestGain it would be awesome to have it tweaked a bit on the automation side. Currently if I draw volume automation (in Reaper), the volume changes are way too drastic, so it would be awesome to have finer control if possible.
Old 14th August 2019
  #37
Airwindows
 
chrisj's Avatar
Quote:
Originally Posted by ZenMaster View Post
Chris, PurestGain has been daily in use here. Thank you for that! And load of other great things you've made! I have a smallish request though.. To fully implement PurestGain it would be awesome to have it tweaked a bit on the automation side. Currently if I draw volume automation (in Reaper), the volume changes are way too drastic, so it would be awesome to have finer control if possible.
Hmm, interesting. So what you need is not so much 'coarse control' and 'smoothed control that goes to zero', as 'same, but fine control'? If I remember correctly we've got +- 40 dB on the dB related control. How many dB should the 'trim' control, for finer adjustments, have?
Old 4 weeks ago
  #38
Gear Head
 

Would -6dB set with PurestGain technically equal exactly BitShiftGain’s -6dB setting or would you regard the latter as superior?
Old 4 weeks ago
  #39
Gear Nut
 

Quote:
Originally Posted by branscobe View Post
Would -6dB set with PurestGain technically equal exactly BitShiftGain’s -6dB setting or would you regard the latter as superior?
BitShiftGain is cleaner than PurestGain when matched as you describe.
Old 4 weeks ago
  #40
Airwindows
 
chrisj's Avatar
Quote:
Originally Posted by Symphony Sid View Post
BitShiftGain is cleaner than PurestGain when matched as you describe.
Sid is correct. PurestGain doesn't make exceptions for exact 6db increments, and that's all BitShiftGain does.
Old 4 weeks ago
  #41
Gear Head
 

Great info, thanks! Chris, could you think if an ultimate gain plugin that combines both abilities, i.e. a PurestGain plugin that switches to BitshiftGain behavior at 6dB steps? This way we could use an ultimate single plug for gain purposes, that would be awesome!
Old 4 weeks ago
  #42
Lives for gear
 
StoneyBCN's Avatar
 

For me, the perfect recipe would be the bit-sized 6.0205dB steps of BSG on the bottom fader, and the fine-tuned +/- 6.0205dB range for final placement/automation on the top fader.

Surprising, there's still a lot of useful implementations of gain control yet to be discovered...
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