Since the concept of "Minimum phase" (MP) comes from "linear systems theory" it is dangerous to try and apply it to a nonlinear system. It may appear to be MP at one level and not at another one - so is it or is it not MP? It cannot be defined.
Also MP is a one dimensional concept and has no multidimensional meaning. A room can be MP from a source to one point and not be to a different point - again it cannot be defined.
I'm sorry Guru Wave. I'm just trying to add to my knowledge & experience from my own poor attempts at these techniques of which you are expert.
But I'm confused
You say- You've tried the 0R1 resistor, PFB bla bla method
- unlike other people, you find no distortion advantage
- There is a need to make sure Impedance of speaker is flat
- But no need to compensate for the bass resonance in a speaker which is surely the biggest feature in a speaker's impedance
- That Audyssey solves everything
- Audyssey DOESN'T solve everything
Do you see less ringing with the PFB? Is this acoustic or electrical? Is it at LF?
Messrs George & SY, I'll pontificate a little about Minimum Phase later cos I'm a pseudo guru on the subject .. especially as it pertains to speakers & rooms.
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It is hard to tell what he suffered, but as the result he definitely acts as if he sees contests in any discussion.
My favorite example. These signals differ only in phase of one of the spectral components. For absolutely identical amplitude spectra, we get totally different time domain signals. One of them will push the amp to clipping, the 2nd will not .....
One has to be careful when working with amplitude spectra only. It is only a half of the necessary information.
One has to be careful when working with amplitude spectra only. It is only a half of the necessary information.
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Quote removed from post that was removed. I believe he was responding to your posting verbage with sarcasm. I must admit that what you wrote could be read several ways.
It would be nice if you both stood down. I enjoy tremendously the technical content you both provide, and wish it to remain above animosity.
thanks,
jn
Any sentence can be read several ways, when out of context. Then sarcasm applied to the distorted meaning. The question is, why somebody would want to do that. Hence, my question, "What's your point?"
I was trying very subtly to make a point. Too subtly I see.
You were condescending, he responded with sarcasm.
Again I ask. Please stand down.
j
1 part positrons
1 part antiprotons
Mix gently (stirred, not shaken)
Turn off the octupole field.
run..
j
This is my testament: I legate my soldering iron to my mother in law.......
.....
....
So that we are clear, I know and you know what the behavior will
be, but the neophytes who lurk here deserve to be clued in. And I was
perfectly serious - I am interested whether the simulations will show the
parasitic oscillation.
For the neo-s reading and wanted to start into SIM -- The low cost sims dont take into account anything that isnt on the schematic. They dont know that you built the circuit with long lead lengths to the gate or have any capacitince to the heat-sink-ground... power supply inductance or C bypassing lead lengths. Nor pcb strays, field couplings etc.
So, no they wont predict oscillations except those caused only by the part values, part models on the schematic and topology. And, then only if the models are sufficiently complete and accurate. And, for semiconductors, that seems to be a big IF.
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Hey, Anitoliy, go easy on poor Richard,
! He's an Aussie, we have a very free and easy way with our humour, and it can easily be misinterpreted by others: he's meaning no malice -- just like you, trying to reach a common understanding ...So, please, on bended knee I implore you to forgive the poor fellow ...
Frank
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