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First cycle distortion - Graham, what is that?
First cycle distortion - Graham, what is that?
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Old 8th January 2021, 09:28 AM   #1071
TNT is offline TNT  Sweden
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First cycle distortion - Graham, what is that?
Yes - no double posting please...

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Old 8th January 2021, 12:50 PM   #1072
Presidentovich is offline Presidentovich  Russian Federation
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Maybe his in love!?
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I don't understand what I am doing, but everything people are telling me is wrong
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Old 4th February 2021, 08:18 AM   #1073
PMA is offline PMA  Europe
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This might be appreciated here , burst recorded with a microphone from 13mm tweeter.
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File Type: png burst_speaker_initial_transient_time.png (40.0 KB, 141 views)
File Type: png burst_speaker_initial_transient.png (240.1 KB, 140 views)
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Old 4th February 2021, 08:34 AM   #1074
billshurv is offline billshurv  United Kingdom
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First cycle distortion - Graham, what is that?
Nice, thank you Pavel.
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Old 4th February 2021, 08:54 AM   #1075
jan.didden is offline jan.didden  Europe
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Very nice Pavel!

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Old 4th February 2021, 11:02 AM   #1076
PMA is offline PMA  Europe
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Thanks guys! You know I am posting quite rarely.
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Old 4th February 2021, 11:05 AM   #1077
scottjoplin is offline scottjoplin  Wales
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Who are you again?
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Old 23rd February 2021, 04:46 AM   #1078
petr_2009 is offline petr_2009  South Korea
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a little history

First cycle distortion - Graham, what is that?
millwood

«i hold a lot of respect for Graham, as well as any member on this forum and I think if proven true, FCD
can be a revolutionary step forward in our understanding of audio and human hearing.»

The many faces of distortion
Graham Maynard

«To me 'linearity' has always been 'continuous proportionality'.
That is a fundamental definition that was not written by me, and it is not wrong.

Amplifier amplitude linearity can be measured in time isolation to specify a good thd figure, and
yet reproduction can still sound poor with dynamic waveforms because of the reactive delays associated
with its internal stabilisation and NFB circuitry.
For those who don't deny its existence, this is where First Cycle Distortion observation will show on the
simulator which amplifiers are capable of clean dynamic reproduction; like the JLH class-A is within its
working capabilities.

If all of this really has been widely known for many years, then I wonder why the argument
(and the inappropriate name calling/mischeivous postings by some !) ?»

I tried to answer the question: “First cycle distortion - Graham, what is that? "By its numerous examples in this and other branches (threads):
Musings on amp design... a thread split.
and even wrote a small memo
since I speak English poorly, and use the Google translator, I also saved the Russian text
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File Type: pdf types of distortion_bilingva.pdf (1.14 MB, 9 views)
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Old 23rd February 2021, 08:33 AM   #1079
RussellKinder is offline RussellKinder  United States
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What do you consider to be a good number for propagation delay through an amplifier, and what do you consider a good method for measuring that?
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Old 23rd February 2021, 09:05 AM   #1080
TNT is offline TNT  Sweden
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First cycle distortion - Graham, what is that?
Quote:
Originally Posted by petr_2009 View Post
Graham Maynard

«To me 'linearity' has always been 'continuous proportionality'.
That is a fundamental definition that was not written by me, and it is not wrong.
Well there you have it. The minuscule time after a non-continuous event, i.e. the start of a signal from 0, is not proportional. For how long? 0,0002 ms? Less? One (1) event!

So what? Everything else i.e. the rest except of the non proportional 0,000000000000000000000000000000000000001 % of the "song" is just exposed to a constant group delay corresponding to the propagation delay of the amplifier - you like storing a song on a tape, LP or a CD but just a "little" shorter duration.

Let this go. It's a mirage that is not worth to chase.

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Last edited by TNT; 23rd February 2021 at 09:15 AM.
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