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In the Forum: Playback Listening
In the Thread: My Audio Philosophy
Post Subject: Taylor SeriesPosted by Amir on: 6/7/2016
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 op.9 wrote:
 Amir wrote:

Hey , I judge the sound by myself , you judge the sound by yourself but we could have common area in our view if we be trained listener, do not search criteria if you believe good sound really exist. biased opinion is between beginner listeners not professional listeners.
so after all it's your opinion ain't it? come on man! 100 people might have 99 different opinions. we Audiophiles are such an elaborately metaphysical creatures. even highly regarded ears have points of conflict in between.


OK , 100 beginner listener have 99 different opinion but trained listeners have more common idea. general listeners shop krell , ML , focal , wilson ,magico, B&W quad manger weiss and ... but most professional listeners listen to horn and linear low power tubes.

 op.9 wrote:

 Amir wrote:
defining sound categorization is not easy and i told you these words are simplified version of my idea about sound. our brain is very complex and sound of systems is very different in out mind . i try to detect what thing in the sound make me more happy.
the point is that the listener doesn't need to have a certain description of a good sound at all. his feeling while listening will tell him everything.


OK you are right but i like to try that. it is not easy but i try to do that.

 op.9 wrote:

 Amir wrote:
my english reading is not good . i do not understand above quote. please describe it again to me.
nothing remarkable. I was just amazed how accurate you are at guessing and predicting like Nostradamus 


The only thing that limit me is my english language skill not my knowledge about my idea

 op.9 wrote:

 Amir wrote:
I defined the Micro linearity as the graph shows what i mean. both dynamic and harmonic could be view in terms of micro linearity.
good dynamic is both speed and non-compress sound. speed of amplifier (Slew rate) in transient is more related to macro linearity not micro linearity.
hey , 3D image do not mean "3D soundstage with good depth" , in my view right micro harmonic make you feel the vocal has depth and it has no relation to soundstage depth.
linear harmonic refer to both amplitude and phase in frequency domain

I believe that there is nothing to concern about what you described as "micro linearity" (still a spuriously coined phrase to me). Linearity has it's own definition. we know what elements affect the linearity of an amplifier and we know all about Slew Rate and IMD blah blah blah. My point is: it's a very difficult job to design and build an amplifier with a non-linear behavior in very small scales of frequency and amplitude. matter of fact despite it's not a good thing but I'm sure it's a hard job to achieve even though a designer intends to do this deliberately but overall non-linearity is easy to get to and for sure it's a nasty thing. I think most of the non-linearity in small scales is caused by speaker impedance variance that will affect the amplifiers that have no loud-independent bandwidth.


OP
I'm 37 years old and i am electronics engineer from KNTU (one of 5 top university in tehran) , many of my university friends now are working in USA and Canada .
I know what is define of linearity in physics , i just say non-linearity could be view from two side : macro and micro.
macro non-linearity is THD and micro non-linearity is viewing higher order of harmonics. micro linearity care about higher harmonics and if you use high feedback loop then you decrease THD but you increase higher harmonic orders. negative feedback mask beautiful micro harmonics.

in mathematics we have taylor series (https://en.wikipedia.org/wiki/Taylor_series). please read it carefully.
we analyse systems in frequency domain by using fourie series. finally in each frequence we have amplitude and phase.
when you apply one frequnce like 1khz then you measure output signal (in load condition like connecting amp to speaker) the output voltage vs input voltage curve should describe by taylor series. the taylor series will tel you about harmonics.
you can check my graphs and in that graphs micro linear system has higher amplitude first order of taylor series and no higher orders in graph.

macro linearity is the same engineers measure but miaco linearity is a function that show you what shape of non linearity is less important to your ears.
i do not say i exactly know that shape but it seems i can give you an idea about that with my graphs.

when you beark-in a cable there is no large difference between break-in cable measurement and non-breakin measurement but if your ear detect huge difference. micro linearity will describe it in objective measurement.


 

 op.9 wrote:

 Amir wrote:
I think i have average to good experience in iran , check my website www.hifi.ir , i listened to many systems in many setups.
DPOLS concept never read in romy site before our real experience in tehran.
one night we placed speaker and the sound became 1000 times better than past. i searched the internet for the reason and i found romy site. before that night i never be familiar with romy site.
DPOLS article was my first visit to this forum.

I'm just shocked how the heck a sound can get 1000 times better even if we are talking in a maniacal unit-less measurement system! 1000 times?! what have you been listening before changing the placement?!I think you won't get anywhere with those extravagant opinions of yours. Audio science doesn't come from east. world is not anxious for a bravado from a 3rd world country to come up with moronic audio philosophical headlines and play the role of Jean-Paul Sartre of Audio world and start spreading out all these ideas. matter of fact experts in west have been experiencing and writing books about this in a practical manner while your mama (who you love) was still wiping your nose. Slew rate, IMD, downward dynamic range and many other technical terms are all known issues so it's definitely needless and pointless to pose subjects like this that come from a narrow mind. you are trying to coin new word like "micro/macro linearity" and some other moot-points that all are worth nothing more than a baby burp. all in all a guy like you with limited audio experience with big game-changing point of views won't draw that much of interest, the same situation here. I think you'd better to try to listen to more stereo setups so you'll find out gradually what the is the hi-fi game all about. period.
guys just excuse possible typo I was typin' in rush hour ;-o


OP
please care, with harsh keyboard you can not bother me, please be relax and polite then try to critic the subject .
the sound is far better when the speaker is in a good place. please go home and try to test it before attacking me.
OK "Audio science doesn't come from east" but it do not come from your harsh keyboard .
OK , I live in 3rd world country but this topic is not a place for attacking "3rd world country" people. vote trump then go USA army for attacking 3rd world country. :-))





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