Two clearly different sounding tones played one after another sequence. Hard to tell what makes them different.
Another challenge: six wave files, some have been processed, some not. Just use your ears and divide in two groups if you can!
Golden Ear Special
jan didden
Golden Ear Special
jan didden
Jan,
Why should I bother? And why should take your challenge? Do I need to proove anything to you? I don't think so. So forgive for declining.
Ciao T
Why should I bother? And why should take your challenge? Do I need to proove anything to you? I don't think so. So forgive for declining.
Ciao T
@ simon7000
1st tone sounds more distorted with higher harmonics than 1st one.
@Thorsten
I will now listen to the tones presented by Jan and present my findings, why not?
If there is one thing that -for me- came out of Ed's first test tone was perhaps unintended, but it is that only a minute delay between start up of fundamental sine wave presents a rather audible click. This points into the direction that phase gets locked by the brain, and that sharp discontinuities lead to sharp artifacts. What could have otherwise be the source of that click.
vac
1st tone sounds more distorted with higher harmonics than 1st one.
@Thorsten
I will now listen to the tones presented by Jan and present my findings, why not?
If there is one thing that -for me- came out of Ed's first test tone was perhaps unintended, but it is that only a minute delay between start up of fundamental sine wave presents a rather audible click. This points into the direction that phase gets locked by the brain, and that sharp discontinuities lead to sharp artifacts. What could have otherwise be the source of that click.
vac
Ed and all
The above makes me emphasize that I have only listened your original file (as well as Klaus brickwalled and mine gapless) through headphones only (AKG K240, Audio Technica AT-706 and one lesser Sennheiser).
This mention of yours about –separate- tweeter may shed some light about your - up to know- unspoken intentions and different reported aural perceptions.
If you only had answered my question!
Regards
George
I took a listen (10-15 times) on Ed’s second file:
A Mid-upper bass tone, losing some higher pitch past the middle of the file. A click (glitch) at the end of the file.
Listening through headphones, eyes closed. Since an hour ago, 1.5l of a fine micro brewed beer resides in my stomach.🙂
Regards
George
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That's all I heard.
Tweeter vs. headphone; both drivers share more than they differ and both have the same intrinsic asymmetry. The tweeter has a much bigger magnet but the diaphragm is in a similar scale. The voice coil location is actually looser on most headphone drivers. However they measure very low distortion usually. I was getting higher distortion on some samples recently and realized I was using a different fixture. It turns out the small electret mike in the fixture had much more distortion than the headphone.
Demian
I made the note about listening the file only through headphones, because I can not disregard the possibility of different acoustic outcome of that file when heard through a loudspeaker system with a midrange, and a tweeter. Physical separation (distance)of midrange/tweeter and the cross-over filter elements may do something to the sound of this file that single element headphones don’t.
That’s a speculation, I haven’t tested it yet.
You’ve provided some stimulating info here:
http://www.diyaudio.com/forums/analog-line-level/146693-john-curls-blowtorch-preamplifier-part-ii-1524.html#post2681637
Scott
Indeed. Thanks
Regards
George
SY
I’m still fiddling with the FFT. I’ll report back.
PS. Demian, your home address ( http://www.element.us.com/demianmartin.htm )doesn’t work for me.
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Did the start-up delay cause the sine wave to start at a non-zero value? That would give an audible click.
jan didden
Thanks Guys and Gals?
The waveform is generated to start at zero, so any start up clicks are in the transmission and decode process.
This was a test everyone seemed to get. The first half is a 150 hertz tone with 1% ninth harmonic distortion. The second half is the same tone without any deliberately added distortion.
So if you listened you know have an idea how bad naked upper odd harmonic distortion sounds.
The waveform is generated to start at zero, so any start up clicks are in the transmission and decode process.
This was a test everyone seemed to get. The first half is a 150 hertz tone with 1% ninth harmonic distortion. The second half is the same tone without any deliberately added distortion.
So if you listened you know have an idea how bad naked upper odd harmonic distortion sounds.
Even starting from zero is a fairly sharp transition from no sine to some sine. I guess a Fourier transform would show all possible frequencies. An 'instantaneous' change in amplitude or phase of, say, a 10kHz tone does not only generate components in the vicinity of 10kHz but everywhere else too (but with diminishing amplitude). We hear a click.
I was thinking of a similar situation with one of those digital attenuators like tha PGA2320 series. The swiching is done on a zero crossing of the signal and generally is inaudible. If you switch off the zero xing, you get the click which, with a rapid increasing or decreasing level is known as 'zipper noise'. Sorry Ed, back on topic!
jan didden
jan didden
Did I download the wrong file? The one I got was 1KHz and H9 all the way thru.
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