This is correct and that is why I use and sell Computer Audio Design products. They filter this noise Paul is talking about, out!!!!
The sound of noise
Ultrasonic noise should have no sound to it. It is, after all, “ultra” sonic which means it is beyond our hearing.
Yet, we know removing ultrasonic noise riding on the music reduces glare and brightness. So, if we cannot hear noise how does it add to the brightness of sound?
Here’s my unscientific guess as to why that’s happening. High-frequency hash and noise upset the amplifier’s circuitry and that’s adding a degree of harshness.
We know from years of experience in circuit design that feedback circuits struggle when challenged with higher-order frequencies. Circuits without feedback sound much more open and are more tolerant of square waves and other high-frequency events that can trigger ringing. (One might then ask why anyone would bother with feedback at any level and that’s a discussion for another day. Let’s just suggest engineering is all about the best compromises for a given result).
The point of this post is simple. Cause and effect are not always 1:1. In other words, it would be easy to argue the logic that ultrasonic noise cannot be bright since we cannot hear the noise. Yet, our experience shows us something very different.
Just because it’s logical doesn’t make it right.
The stories we tell
I don’t know anyone that doesn’t have a dozen stories explaining everything they believe. From religion to politics to stereo systems, the stories we tell and believe explain the world to us. Until those stories change.
It’s easy to buy into the notion your stories represent truth—an obvious contradiction since opposing stories can’t both be valid.
Remember the stories you once believed as a kid? Santa Claus, the Easter Bunny, the Tooth Fairy. They were all true back when, and now you smile and call them cute.
I am not convinced the stories we’re telling ourselves now have a whole lot more validity than the color of Rudolph’s nose but, in fairness, at least our stories are backed up with personal experience.
I am riffing on this today because I have been writing to an awful lot of audiophiles lately. Perhaps more than normal. And the general theme that got my attention was this belief that we should sequester ourselves in like-minded camps: vinyl heads, tube lovers, solid-state aficionados, class D haters. Their logic is interesting. By collecting in groups their cause finds strength.
Strong causes get attention.
I would like to argue just the opposite. By being open and accepting of the wealth of diversity in design we have better products: tube and solid-state hybrid amplifiers and preamplifiers like that of BHK, class D and sweet FETs as in Stellar, electrostatic panel coupled with dynamic woofers as you find in Martin Logans.
Diversity leads to creation and opens new doors.
Clustering in like-minded packs moves us back into the caves.