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Is all distortion bad?
Is all distortion bad?
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Old 13th October 2018, 10:54 AM   #1
Baldin is online now Baldin  Denmark
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Default Is all distortion bad?

Was watching this litte video of the new Solid Stage Logic Fussion unit, used in studios for adding that extra little warmth, and saturation to an overall mix. Watch it here YouTube

I think the "Vintage Drive" section is especially interesting in HiFi context. Listen how it enhances the sound, but without making it sound strange. I would think that by adding just a little to your stereo signal you would gain something similar to "tube sound". I guess this is why people really like Tubes still ... they add harmonic distortion to the signal but in a very pleasing and enhancing way. (probqably getting into trouble for saying that ) So while we are trying very hard to reduce all kind of distortion, when amplifying a signal, which I in general think is necessary to limit harmfull odd order distortion IMD and things like crossover sistortion, Maybe it could be good to the listening experience to add a littel evenorder distortion, especially to the mid to high end.

Also watch this video to see and hear how much difference there is to different tybes of distortion, that is how easily you can actually detect these: YouTube

Anyway, any ideas as to how SSL Fusion vintage drive actually works, and how you could make such a circuit relatively simpel?
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Old 13th October 2018, 11:10 AM   #2
lineup is offline lineup  Sweden
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When I reduce and combat distortion while making total dist THD as low as possible I reduce all sort of dist like ODD harmonies. It is true I also reduce 2nd and 4th.

Without any sort of harmonic dist the music I get is the same as in the recording. If I add 2nd harmonic dist, I do not get the true recording.

My bottomline is: Try to get the THD as low as possible. Do not add any kind of harmonies.

Todays OP-Amps have as low THD as 0.00002% They give you the true experience in sound.
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Old 13th October 2018, 11:59 AM   #3
DF96 is offline DF96  England
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Some people like distortion; some people don't.

Some people design valve amplifiers to minimise distortion; some people don't; some don't really do design at all.

Some people think that 0.00002% distortion sounds better than 0.0002%; some think 2% sounds even better.

Last edited by DF96; 13th October 2018 at 12:01 PM. Reason: extend
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Old 13th October 2018, 12:38 PM   #4
jan.didden is offline jan.didden  Europe
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As Nelson Pass would say: "it's all entertainment"

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Old 13th October 2018, 12:49 PM   #5
scottjoplin is offline scottjoplin  Wales
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Quote:
Originally Posted by Baldin View Post
Anyway, any ideas as to how SSL Fusion vintage drive actually works, and how you could make such a circuit relatively simpel?
Quote:
Originally Posted by jan.didden View Post
As Nelson Pass would say: "it's all entertainment"
H2
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Old 13th October 2018, 01:23 PM   #6
dondo is offline dondo
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I think this is the main difference between Hi-Fi and Hi-End philosophies. I'm I wrong? Goal of Hi-Fi is to achieve a fidelity on the reproduction, so... keep the distortions lower as possible. Goal of Hi-End is to entertain. So... if the sound is more beautiful to the listener anything is accepted, even 2% THD. But I believe also that the "perfect" sound some Hi-Fi systems offer is often too clinic, too my ears.

To make an analogy. Pianos are rarely tuned on a perfect scale, but on a scale with something called musical temperament. If you tune them mathematically they sound terribly bad. I think this is a good analogy to explain this difference.
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Old 13th October 2018, 01:30 PM   #7
scottjoplin is offline scottjoplin  Wales
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Quote:
Originally Posted by dondo View Post
To make an analogy. Pianos are rarely tuned on a perfect scale, but on a scale with something called musical temperament. If you tune them mathematically they sound terribly bad.
I think this is a good analogy to explain this difference.
Sorry it's a very poor analogy because it's tuned to the equal temperament scale, which is mathematical and not "musical"
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Old 13th October 2018, 01:52 PM   #8
PMA is offline PMA  Europe
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Yes, "all" distortion is bad. If you subtract distortion from the music signal and listen to distortion component only, you will find that it sounds just horrible. This applies to low-order distortion as well, regardless it is less audible due to masking.
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Old 13th October 2018, 02:12 PM   #9
traderbam is offline traderbam  Europe
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Not every distortion is equally bad.
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Old 13th October 2018, 02:16 PM   #10
Baldin is online now Baldin  Denmark
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Quote:
Originally Posted by jan.didden View Post
As Nelson Pass would say: "it's all entertainment"
Jan
I think that is a good statement And the H2 seems like one good startingpoint, and rather easy to build

The funny thing is that in the studio they will just add all kind of distortion to make it sound good. A plain reccording will simply sound dull.

And the thing about making sure it will sound just as the recording is of course not obtainale, as you are not listening in the studio where it was recorded, the room is not the same and the speakers are not the same etc. so it will never sound the same.

My thinking is to try out an addition to my power amps, which can be switched in or out if mid/high sounds better with the addition.

Any other suggestions to circuits? What about the Aphex Exciter?
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