Can you tell original file from tube amp record? - test

[turk 182]

i must not correctly understand articles like this then Harmonic errors in equal tempered musical scales

oh well more homework...where's my scotch...

 

[Jakob2]

What else would you recommend as a probability of one guess of two possibilities other than p = 0.5

Why should i recommend something else than p = 0.5 ?

 

[scottjoplin]

i must not correctly understand articles like this then Harmonic errors in equal tempered musical scales

oh well more homework...where's my scotch...

Equal temperament is a convenient approximation. We are used to it so it sounds harmonious to our ears. The case of the "blue note" is interesting, it can sound out of tune Blue note - Wikipedia

 

[turk 182]

try this Distortion In The Studio |

sorry Pavel to much side bar...bar...oh yeah my scotch...later guys!

 

[scottjoplin]

Not all the overtones that make up the timbre are harmonic. My feeling against harmonic distortion in reproduction is that it can add to dissonance due to the non harmonic scale. It can also change timbre.

I may be wrong, it's all very subjective, I would argue even what constitutes dissonance is subjective

 

[PMA]

Yes it can, however it is not easy to find limits of audibility, related to distortion level, distortion profile, sound pressure level and music under test. Pure sine waves are by far most sensitive to distortions, in case they were listened at proper sound level, before the intrinsic ear distortion prevails.

 

[Jakob2]

@PMA,

let me repeat the question:
"Why should i recommend something else than p = 0.5 ?"

or what was the reason to ask me for another recommendation than p = 0.5?

 

[turk 182]

damn it i spilt my scotch...Scotchjoplin have a gander Musical Consonance: The Importance of Harmonicity - ScienceDirect

i don't think he read that last one oh well...

 

[scottjoplin]

Thanks, that was very interesting. A bit more on what I was trying to say on the timbre not necessarily being comprised purely of harmonics (since it's mentioned also in that article, although it could be a matter of semantics) Harmonic series (music) - Wikipedia

 

[Mooly]

A little OT but quite entertaining and 100% subjective in which you might prefer. Lots of harmonics flying around here

$600 to $360,000 Pianos

 

[scott wurcer]

A little OT but quite entertaining and 100% subjective in which you might prefer. Lots of harmonics flying around here

$600 to $360,000 Pianos

I actually preferred the $600 piano for its immediacy.

 

[maty tinman]

Harmonics

About harmonics, I just read what Hugh Dean (AKSA) wrote:

The Blomley Class B amplifier

I have found that a linear, decreasing harmonic profile sounds very natural, but measures badly.

If H2 starts at -90dB, and increasing orders drop by 10dB finishing with H5 at -120dB, the sound is very clean but cannot be criticised. OTOH, if H2 starts around -68dB, with increasing orders dropping 10dB and finishing with H5 at -98dB the sound is markedly warm, natural and rich.

While we recognise a 'sound effects box' it is difficult to ignore such an amplifier, it sounds wonderful, not the same as a tube amp (with it's typical H2 starting around -45dB) but not dissimilar. All this indicates subtle, unexpected psychoacoustics, almost the negation of the zero THD yore we all look for.

...The final comment concerns feedback, which in global fb amps create corrections to corrections, out to higher orders. Something seems to happen beyond about 35dB of global fb where the front to back, 'depth of image', seems to shrink, giving only 2D stereo image.

 

[turk 182]

he says "har it's monic" i say "'ar ces monique" ...i'm putting the scotch away...naptime.

 

[PMA]

Class A operation is up to 18W/8ohm and up to 9W/4ohm.

Sorry, I made a mistake. Class A operation is up to 36W/8ohm and up to 18W/4ohm .

 

[turk 182]

i like this one better because despite the background noise of the mall and the questionable recording quality you can hear how playing technique can vary the timber of notes...that's got to be harmonics... YouTube

 

[scottjoplin]

There's also euphonic sounds YouTube

 

[scott wurcer]

And then there is this...

YouTube

And this...

YouTube

 

[scottjoplin]

Not forgetting this Mussorgsky: Pictures at an Exhibition, Horowitz (1951) ムソルグスキー「展覧会の絵」ホロヴィッツ - YouTube

 

[cbdb]

Not all the overtones that make up the timbre are harmonic. My feeling against harmonic distortion in reproduction is that it can add to dissonance due to the non harmonic scale. It can also change timbre.

I may be wrong, it's all very subjective, I would argue even what constitutes dissonance is subjective

Most overtones are harmonic. A string or pipe, covers most instruments, vibrates at fractions of the length. Full length, fundamental, 1/2 length second harmonic, 1/3 lenght 3rd harmonic, etc. so it's a physical relationship. Non harmonic scale is used so different key signatures sound different ( the chords ), not just in pitch. The spacing between notes ( in frequency) changes for different keys. But each note in the chord has harmonics that are multiples of the fudamental. So harmonic distortion does not add new freq on most instruments. Drums and cymbals are a different story.

 

[scottjoplin]

Which non harmonic scale do you mean? I don't see how it follows that the notes in the chord can be harmonic if the scale is non harmonic