Search results for query: *
- Users: Pio2001
- Order by date
-
On High-Fidelity and Equalizing (rant...sort of)
Wouldn't the vinyl sample be recorded with a Grado Gold cartridge, by chance ? It sounds like it has too much treble. Record the same vinyl with a Stanton cartridge, and you have the opposite result : too much bass.- Pio2001
- Post #4
- Forum: Sound Science
-
is this really a problem with blind tests?
I this case I apologize. The question about how to get the -100 db number from the substraction seemed a bit strange, so I assumed -wrongly- that you didn't know what a waveform was. As said by Gregorio, we should look at the value of the highest peak, or more precisely, the level, in dBfs...- Pio2001
- Post #72
- Forum: Sound Science
-
is this really a problem with blind tests?
For the first question, it would be better if you familiarize yourself with the basics of digital audio : what is a sound, what is a digital sound, how does an audio editor work, sample rate, quantization, then go on to more advanced topics, like spectrum analysis, RMS level etc. For the...- Pio2001
- Post #60
- Forum: Sound Science
-
is this really a problem with blind tests?
Yes, it seems so. Scholar.google.com returns a lot of results for the keywords "auditory discrimination threshold short term memory".- Pio2001
- Post #57
- Forum: Sound Science
-
is this really a problem with blind tests?
You can't. You have to learn the difference before finding the right passages. It can take time. But this is only the case if you don't know the difference. It means that you are in a situation where you hear no difference immediately, but you suppose there may be one. Quite uncommon, but...- Pio2001
- Post #52
- Forum: Sound Science
-
is this really a problem with blind tests?
Oh no, certainly not. The sample must be carefully chosen. For mp3 vs wav, for example, there may be no audible differences for minutes, and then suddenly, a difference appears just at a given time, because the sound of an instrument that plays just here is badly encoded. An extreme...- Pio2001
- Post #47
- Forum: Sound Science
-
is this really a problem with blind tests?
Hi, There is a difference between assessing a musician's sound and assessing a technical characteristic of a sound: the musician is not playing to its full ability for each note. Its inspiration can reveal itself only during some parts of the performance. Its skill varies with time in a short...- Pio2001
- Post #43
- Forum: Sound Science
-
How Much Does Hearing Loss Really Affect Audiophile Enjoyment/Missing Details? (Did I **** Myself?)
Hi, Do not expose yourself to high volume for such long times ! I have had a permanent hearing damage staying 8 hours in a nightclub where I estimated the sound level to be 110 dB. My hearing limit dropped from 16 kHz to 14-15 kHz. I became unable to estimate the sound level as accurately...- Pio2001
- Post #8
- Forum: Sound Science
-
Why Not 16-bit No-OS No-Filter Conversion?
This paper entirely misses the point : oversampling is necessary to avoid the flawed frequency response of the "zero order hold" digital-to-analog conversion, with a treble roll-off that reaches -4 dB at 22050 Hz. Zero order hold is the technical choice of generating analog "stairs" instead of...- Pio2001
- Post #3
- Forum: Sound Science
-
Objectivists board room
For lowpass filtering in a DAC, linear phase FIR should be used, isn't it ?- Pio2001
- Post #1,757
- Forum: Sound Science
-
Objectivists board room
Hi, In my understanding, it is correct. Oversampling features sharp filters in the digital domain instead of analog, which is much easier, and a gentler one in the analog domain. The trade-off between frequency response and transient accuracy is an old legend. There never has been...- Pio2001
- Post #1,754
- Forum: Sound Science
-
All tracks on approximately 92% of compact discs (CDs) play in inverted polarity on approximately 92% of compact disc players
Aaaaah ! That explains everything. They think that the absolute polarity of a given CD is this or that because it sounds wider or narrower to their ears when they reverse it ! They have listened to hundreds of CD, and just said "this one sounds in phase, that one sounds out of phase." ...- Pio2001
- Post #15
- Forum: Sound Science
-
All tracks on approximately 92% of compact discs (CDs) play in inverted polarity on approximately 92% of compact disc players
Hi, here is my review about the quoted text : Quote: One must define "Compressions and rarefactions of the original performance". It might mean "Compressions and rarefactions" at the listening location, in the audience, but nearly no music is recorded from the audience. It might not...- Pio2001
- Post #7
- Forum: Sound Science
-
Blind Testing : Tube Amps vs SS Amps
Hi, There was such a blind test published by Sound and Vision mag. It was available as a file named ampspeakerinterface.pdf, but it doesn't seem to be online anymore. The result of the blind test was that the listeners could distinguish the transistor amplifier from the valve amplifier if...- Pio2001
- Post #9
- Forum: Sound Science
-
Vinyl vs Redbook in 2015
I have read the manual of the DLIII, and they say "Select the sample rate you wish. There are two choices available on the front panel: 96kHz and 192kHz. What comes out of your transport or CD player is 44.1kHz. The DLIII will upsample this to a higher, and better sounding sample rate. Choose...- Pio2001
- Post #50
- Forum: Sound Science
-
Vinyl vs Redbook in 2015
Resampling, oversampling and ASRC (Asynchronous Sample Rate Conversion) are three different things. Oversampling is done natively inside nearly all DACs. It is a necessary step for a proper digital-to-analog conversion, especially at 44100 Hz. Some exotic high-end designs are capable of...- Pio2001
- Post #48
- Forum: Sound Science
-
Vinyl vs Redbook in 2015
DACs and cartridges have their own output level. It varies from one model to another. When you compare the sound of a vinyl to the sound of its own digital copy, played through a DAC, you adjust the playback volume so that the loudness is the same. What I was saying is that If, in this...- Pio2001
- Post #38
- Forum: Sound Science
-
Vinyl vs Redbook in 2015
Hi jtaylor991, The first thing to investigate in order to sort out why vinyl sounds superior to you is the couple cartridge / headphone or cartridge / speakers. The cartridge used to play records can have a strong influence on the sonic result, especially in terms of frequency response : some...- Pio2001
- Post #32
- Forum: Sound Science
-
Blu-ray Pure Audio vs. CD (Loudness war)
Yes, I have a lot. Electro-pop from the 80's, trance from the early 90's (especially the Eye Q label)... But a very good example would be Kraftwerk - The Man Machine (the master of 1985 that has always been available on CD, not the SACD remasterings from the 2000's). But if we look at...- Pio2001
- Post #18
- Forum: Sound Science
-
Experiences with difference in L/R ear sensitivity, air pressure, etc.
Water is not completely safe. If you have got a wax plug building, the water can remain trapped behind it and make it grow.- Pio2001
- Post #8
- Forum: Sound Science
-
Testing audiophile claims and myths
Quote: The measurements show that from a pair of headphones to the next, the frequency response differ by an amount of 10 dB at given frequencies. According to ABX tests, this is more than 10 times bigger than the smallest detectable threshold ...- Pio2001
- Post #136
- Forum: Sound Science
-
Testing audiophile claims and myths
Not between headphones or IEM that I know of. But the measurements made with artificial heads make clear that ABX test would succeed. What do you mean with bitrates ? High resolution or lossy compression ? Mp3, aac, Vorbis, something else ? CBR, VBR, ABR ?- Pio2001
- Post #132
- Forum: Sound Science
-
How do I trust the frequency response graphs?
Quote: These are voltage generators. But we are talking about acoustic measurements. How do you generate a given acoustic pressure if your pressure measurement device, the microphone, is not calibrated yet ? There must be some kind of microphones that have a flat frequency response...- Pio2001
- Post #7
- Forum: Sound Science
-
How does fidelity relate to musical enjoyment?
The fidelity to the original performance it totally out of reach of current technology. This is brillantly demonstrated in Floyd Tool's book "Sound Reproduction", figure 3.3 page 36, with the directionality of a violin at different frequencies. From 200 to 400 Hz, a violin is...- Pio2001
- Post #11
- Forum: Sound Science
-
How do I trust the frequency response graphs?
Err.. what ? Yooss was wondering how frequencies "of a given amplitude" could be generated without first knowing the frequency repsonse of the speaker.- Pio2001
- Post #4
- Forum: Sound Science