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Drive manipulation, any consensus?

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Drive manipulation, any consensus?

Postby dejhantulip » Fri May 16, 2014 2:35 pm

Hey everyone!

Quick question regarding the DRIVE paramater in various nebula programs.

I have read in AlexB's manuals and some other threads here and in gearslutz that the Drive parameter should be left alone because it can introduce artifacts and unpleasant sounds. I would like to know if there is a consensus on whether it is safe/ok/recommended to tweak it upward or downwards?

What are your thoughts regarding this matter?
Also, do *you* tweak it?

Thanks!


-DT
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Re: Drive manipulation, any consensus?

Postby jorismak » Fri May 16, 2014 3:09 pm

1) there is a difference between 'drive' and 'gdrive', please take notice of that :)

2) if it sounds good to you, use it. That rule always applies.

3) the 'drive' generates extra harmonic distortion, by 'faking' the THD that is in the captures. It artificially increases the harmonic distortion.. so it is 'not real', and I think that is why a lot of people don't want to use it :P.

4) the 'gdrive' method is more natural, more real. It is basically a trim for your input and output volume, that's it. So increasing the gdrive makes it so that your signal hits the captured-preset harder. Most (if not all) nebula captures are done at different levels, and the harder they hit the real device, the more harmonic distortion nebula captures. So increasing the gdrive, increases the level of your signal as it hits the nebula-preset (without changing output-level) and thus picks the captures in the nebula preset that are mot 'hot' and generally speaking have more harmonics (but can also have different EQ curves for instance).

In other words, increasing 'gdrive' is the same as increasing input gain, and then decreasing output gain by the same amount. And vice versa.
increasing 'drive' overhypes the harmonics in a not-real way.
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Re: Drive manipulation, any consensus?

Postby dejhantulip » Fri May 16, 2014 4:58 pm

jorismak wrote:1) there is a difference between 'drive' and 'gdrive', please take notice of that :)

2) if it sounds good to you, use it. That rule always applies.

3) the 'drive' generates extra harmonic distortion, by 'faking' the THD that is in the captures. It artificially increases the harmonic distortion.. so it is 'not real', and I think that is why a lot of people don't want to use it :P.

4) the 'gdrive' method is more natural, more real. It is basically a trim for your input and output volume, that's it. So increasing the gdrive makes it so that your signal hits the captured-preset harder. Most (if not all) nebula captures are done at different levels, and the harder they hit the real device, the more harmonic distortion nebula captures. So increasing the gdrive, increases the level of your signal as it hits the nebula-preset (without changing output-level) and thus picks the captures in the nebula preset that are mot 'hot' and generally speaking have more harmonics (but can also have different EQ curves for instance).

In other words, increasing 'gdrive' is the same as increasing input gain, and then decreasing output gain by the same amount. And vice versa.
increasing 'drive' overhypes the harmonics in a not-real way.


Amazing explanaion, thanks!
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Re: Drive manipulation, any consensus?

Postby Support » Fri May 16, 2014 7:40 pm

From the sampling NAT point of view.

The advantage of using a sweep is that at any time we produce only a single frequency, and any distortion introduced will consist of the harmonics of that frequency only. If we use a rising frequency sweep, the harmonics will be generated ahead of the same frequencies appearing in the signal. So after deconvolution, any distortion will appear as spurious peaks in negative time in the impulse response, and most of it can then be edited, or deleted.

This is the reason you can increase or decrease 2nd to 10th harmonic, NAT auto edit harmonic called H2 to H10. So you sample a gear and you get an infinite possibility. GDrive is more natural effect than use drive but you decide. Also sweep (brute force) technique rejects noise (extra super cool feature)
Best regards,
Enrique Silveti.
Acustica Audio customer and technical support
http://www.acustica-audio.com
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