Are we looking at distortion correctly? - Page 2

millwood · 13th July 2004, 03:20 PM

along the same line from tiroth's pictures, I put two more together. Each trace in a picture has exactly the same amount of THD (10% in this case). And you tell me which ones you would like to hear (like "pink in picture 1", or "green in picture 2").

here is picture 1.

tiroth · 13th July 2004, 03:20 PM

Quote:

Originally posted by DRC
Did I win ?

Soon we shall see...I am trying to annoy everyone as much as possible.

No, really, I am just curious myself to see how the results are interpreted.

moamps · 13th July 2004, 03:22 PM

Quote:

Originally posted by tiroth
Any more guesses?

1 - smallest THD
2 - only 2. in antiphase
3 - only third
4 - 2. and higher 3.
5 - higher 2. than 3.

5. - looks like my 6C33 SET measurement, then is IMO the best

Regards
Milan

millwood · 13th July 2004, 03:22 PM

picture 1

millwood · 13th July 2004, 03:24 PM

picture 2

tiroth · 13th July 2004, 03:49 PM

Very interesting comments moamps. Do you mind ordering them in terms of sound quality? I am certain 1, 5 are near the top but it will be more amusing to be able to compare all the predictions.

These are my "guesses" based entirely on the appearance--this isn't the solution key.

1, 3, 2, 5, 4

moamps · 13th July 2004, 04:14 PM

THD order (from small to high) : 1, 2, 3, 4, 5
subjective sound quality (from worst to best): 3, 4, 1, 2, 5

IMO

tiroth · 13th July 2004, 04:57 PM

Quote:

Originally posted by millwood
along the same line from tiroth's pictures, I put two more together.

Picture 1.

tiroth · 13th July 2004, 04:59 PM

Thanks to everyone who participated in a fun if slightly silly exercise.

Quote:

The guesses:
Parentheses to show unordered pairs
1, 3, 2, 5, 4
(1, 3), 2, (4, 5)
1, 2, 3, 4, 5 [THD guess]
5, 2, 1, 4, 2 [Quality guess]
1, 3, 2, 5, 4

Answer key
In order of raw percentage: 1, 3, 2, (4, 5)
My thought based on conventional wisdom would be the best sounding would be: 1, 5, (2, 3), 4

Actual waveforms:
#1 THD 0%
#2 THD 3.08% (2nd-7th, each -38dB)
#3 THD 1.73% (3rd -40dB, 5th -40dB, 7th -40dB)
#4 THD 5.17% (3rd -30.5dB, 5th -30.5dB, 7th -30.5dB)
#5 THD 5.17% (2nd -30.5dB, 4th -30.5dB, 6th -30.5dB)

Quote:

Originally posted by moamps
5. - looks like my 6C33 SET measurement, then is IMO the best

This is the most interesting comment to me. This is of course the classic high even order distortion that is "supposed" to sound good. I think you have a good eye moamps, not surprising.

millwood · 13th July 2004, 05:04 PM

Quote:

Originally posted by tiroth

Picture 1.

which one in that picture do you prefer?

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13th July 2004, 03:20 PM	#11
millwood Account Disabled Join Date: Apr 2003 Location: US	along the same line from tiroth's pictures, I put two more together. Each trace in a picture has exactly the same amount of THD (10% in this case). And you tell me which ones you would like to hear (like "pink in picture 1", or "green in picture 2"). here is picture 1.

13th July 2004, 03:49 PM	#16
tiroth diyAudio Member Join Date: Dec 2001 Location: Pittsburgh, PA, USA	Very interesting comments moamps. Do you mind ordering them in terms of sound quality? I am certain 1, 5 are near the top but it will be more amusing to be able to compare all the predictions. These are my "guesses" based entirely on the appearance--this isn't the solution key. 1, 3, 2, 5, 4

13th July 2004, 04:14 PM	#17
moamps diyAudio Member Join Date: Oct 2002 Location: Croatia	THD order (from small to high) : 1, 2, 3, 4, 5 subjective sound quality (from worst to best): 3, 4, 1, 2, 5 IMO

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