SouthSIDE Glen said:
And a set of a paltry dozen or so specified parameters will never be able to accurately model the full characer of the audible sounds represented by the voltages produced by a real-life solid-state circuit.
G.
Today's simulators work at over 60 degrees to interpolation and perform more analysis than a human could do full time during his entire life! We have the tools to get things scientifically right and this is what we should be aiming for.
It all comes down to what you want to do:
1) Do you want to be scientifically rigourous and provide an excellent circuit that has awesome specs ?
OR
2) Do you want your circuit to be pleasant to some listeners who like how your circuit colors the sound and introduces non-linerarities ?
Number one will make scientific advances and breakthough possible, while the second one will get you to sell a few more units. It's all a matter of choice.
Indeed, I have found out that many amp designers are now shooting for "less than perfect" designs using no (or very little) negative feedback. Those circuits have poor specs (0.1% distortion is common) and manufacturers claim they sound better than a well-designed feedback amp. This is entirely NOT true. The only way you can pretend a distorted signal sounds better is by admitting you don't like a flat sound.
What I have found over my years of "audiophile behaviour study", is that MOST people don't like how "flat" sounds. So they tend to shy away from flat because they say it's "lifeless", "boring", etc. Thus, many audio professionnals use $5k devices that introduce some kind of coloration to get the sound they want. This is an entirely different story, since the coloration is used as an EQ and is not part of the monitoring chain.
To get back on topic, my experience showed me that the human ear tends to like some distortion and some color to the sound, which defeats the entire purpose of monitoring and preamping a $1k Royer ribbon mic...since you are coloring it further with the preamp. If that's the sound you aim for, great. But as a scientist, I aim for flatness and accuracy.
When one designs a preamp, you should aim for the best specs possible and least coloration. This is what Mackie does. And most people call their preamps "flat" and "boring but doesn't add anything to the signal"...isn't this how ANY preamp should sound if we favor scientific rigor? At the end of it, sound physics, electronics and signal analysis are well known and there is nothing left uncovered yet.
Mixing is another story, because you don't design a signal that's going into another equipment, you design a signal that's going into ears, so you have to make your mix good to the humar ear, not scientifically accurate. In my book, a preamp should aim to be as flat as possible to get the most out of your mic and source.