Thread: A Search for Truth and Tonality, Part 2 ...

fas42

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Sorry Frank, your fellow NSW'er has got you over a barrel.
Sorry, Jack, it doesn't count. Terry's talking about "good" sound; I'm talking about "real" sound. As in, play a "quality" recording of that clip on your system, and listen from the doorway: do you hear a "real" snare drum in a bare room, followed by the ever more muffled versions thereof. The peak transients should be sufficiently convincing that you do the Maxell question ...

Frank
 

fas42

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there is no way that I can have a drum kit 4m away (1m would hurt my ears too much), listen to it live, and then play back the recording and stand right next to the speaker, and not to be able to tell the difference. This is an objective statement.
Gary, does that mean all drummers are deaf, or a deranged sub-species? As in also, members of an orchestra who are sitting a couple of feet in front of a full brass section?

So, as far as telling the difference between live drums and reproduction, what would fail you? Insufficient maximum SPLs, distortion of the system, or some magic quality, indefinable and ghost-like, that only live sound has?

Frank
 

fas42

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From: http://www.whatsbestforum.com/showt...inal-frontier.&p=106022&viewfull=1#post106022 ...

I don't think Frank was exaggerating so much as he was cueing up for another round of "I can make bad recordings sound good (in this case better than DSOTM), by turning off wireless devices and soldering my fillings to the wall." He knows the rep those discs have and was just setting up his usual game.
Well, it always helps to do a little research as to why albums have a certain sound, from http://en.wikipedia.org/wiki/Led_Zeppelin_%28album%29:

Page reportedly used natural room ambience to enhance the reverb and recording texture on the record, demonstrating the innovations in sound recording he had learned during his session days. Up until the late 1960s, most music producers placed microphones directly in front of the amplifiers and drums. For Led Zeppelin, Page developed the idea of placing an additional microphone some distance from the amplifier (as far as twenty feet) and then recording the balance between the two. By adopting this "distance equals depth" technique, Page became one of the first producers to record a band's "ambient sound": the distance of a note's time-lag from one end of the room to the other.[14][15]
Another notable feature of the album was the "leakage" on the recordings of Plant's vocals. In a 1998 Guitar World interview, Page stated that "Robert's voice was extremely powerful and, as a result, would get on some of the other tracks. But oddly, the leakage sounds intentional."[14] On the track "You Shook Me", Page used the "backward echo" technique. It involves hearing the echo before the main sound (instead of after it), and is achieved by turning the tape over and recording the echo on a spare track, then turning the tape back over again to get the echo preceding the signal.[14]
If the system is not in good form these acoustic clues come across quite confused, your head can't make sense of them, and the album becomes quite messy, the acoustic signatures can't be unraveled. However, once the setup is sufficiently transparent then it all makes sense, and translates into massive depth, width and height, far more than DSOTM.

Having just experienced how badly top notch studio monitors behave in an electrically noisy and complicated environment, I can appreciate more why the recording engineers don't "get" it: LZ1 would have been a disaster in the listening environment yesterday ...

Frank
 

fas42

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From http://www.whatsbestforum.com/showt...n-the-Mac-Mini&p=105909&viewfull=1#post105909 ...

I'm having a bit of trouble connecting lower EMI and RFI to "Singers had more body, instruments more substance and texture," Lee. Yes, the lowering of the noise floor is a good thing. Been there, done that. That's what properly shielding against EMI and RFI can actually do. Specific impact on the tonality of voices and instruments? Not unless there was so much noise that you could not hear the tonality before. The one thing in that description that strikes me as possible - a bit of a stretch, but possible - is the texture remark. If we are talking about extremely low-level detail, the lowering of the noise floor may let more through.
This again is where Tim just doesn't get it: I've just experienced how awful his beloved active monitors sound when no attention is paid to cleaning up the electrical environment, irrespective of how "perfect" their frequency responses, etc, are. Those types of interference are exactly what causes that dreary, uninvolving "pro" sound; that fairly rapidly gets you in the "I just want turn this stuff off, and sink a beer or two" mood ...

Frank
 

fas42

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From http://www.whatsbestforum.com/showt...inal-frontier.&p=106131&viewfull=1#post106131

Definitive answers will be hard to come by while so many insist that identical data will produce identical sound. The assumption seems to discount that what is on the discs isn't "ones and zeros" as so many believe. The disc player must track the spiral of pits, focus the laser, read the data, decode the 8:14 modulation (which writes what are effectively nine different length pits - visible as sine waves on an oscilloscope), do redundant reads when necessary (information is written more than once on a disc), perform error correction and decode the binary information into analog, all in real time (and often with a common power supply for laser tracking, audio, etc.). In extraction to a computer, real time isn't a factor; the drive can read as many times and for as long as it has to in order to get the correct read. The read and the listening aren't occurring at the same time. Perhaps this has something to do with it.
In simple terms, there is really such thing as digital, at the level of electronic parts behaviour: as I have noted before, the notation of 0's and 1's is ultimately a convenience for describing the "bigger picture " functionality of the process of turning what exists on the CD into an analogue waveform. Which means that all the little subtle nasties of analogue misbehaviour can intrude into the pure world of "digital" processing, if they're given sufficient opportunity, at the crucial phase of the D to A conversion. And that doesn't even consider that if the CD transport is working harder to read the CD signal then its power supply will draw more erratic or spikey current waveforms from the mains, which can then intrude into the workings elsewhere in the audio system.

In electronics there are no true "black boxes": modules of circuitry that 100% independent of, or "protected" from, behaviours elsewhere ...

Frank
 

fas42

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From http://www.whatsbestforum.com/showt...ess-a-mic-feed&p=106096&viewfull=1#post106096

When I first started out as a studio assistant, I watched the engineer place seven mics around a drum set. This, as far as I was concerned, was how it was done in the studio. (Later on, I'd seen as many as seven mics just on the snare drum!) It didn't sound anything like what I was hearing with two ears though.

A few years, later, when I was the senior engineer, at first I experimented with capturing the whole set with only three mics. I heard a distinct improvement over seven, with more a more clear, open sound. Nowadays, I use zero mics on drums. ;-} I no longer mic instruments; I mic the event.
Hallelujah!! May the Lord be praised -- one day sanity may fully return ...

Frank
 

fas42

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From http://www.whatsbestforum.com/showt...inal-frontier.&p=106216&viewfull=1#post106216

obviously; we are speaking here about whether percieved depth varies from system to system, and if it does ; Why?

i submit that percieved depth has alot to do with the space behind the speakers; how large it is, how it's shaped and the type of surface treatment. then the set-up of the speakers has a large effect, particularly toe-in and tilt. last; seating position effects depth to some degree as it changes relationships of parts of the soundstage.
Unusual for you to say that, Mike. I have just spent two consecutive days listening to studio monitors, using a well recorded live performance CD with plenty of depth. Dud listening environments in every sense of the word on all occasions, and all of Tim's medioc ... err, magnificent active marvels completely eliminated any sense of space, totally. Except for one, which was quite a pleasure to listen to. The subtleties you speak of were a million miles away from the picture, but the quality of the setup and the environment were quite contrasted.

I have yet to hear anything that miraculously rescues poor sound, if what's emerging from the drivers is not up to snuff. One may carp about bits and pieces, but trying to compare, and pick a winner between various styles of dreary sound is not very satisfying to do ...

Frank
 

fas42

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From http://www.whatsbestforum.com/showt...l-a-Preference&p=106146&viewfull=1#post106146

There is so much information missing from the bottom end, mid bass, and midrange that it just sucks the life out of recordings once you become accustomed to what *you think* they should sound like. There is simply much more information being passed through the Krell amp. I bet aside from power measurements both of these amps would measure pretty much the same with the usual cast of measurements that are commonly used when measurements are actually made and published which is far rarer than objectivists like to think.
It's a good thing that expensive amp's know how to do this -- it must be a good portion of audidophile magic, or pixie dust that makes it happen. I don't quite understand how cheap equipment knows how to block off the extra information, there must a special filter in there somewhere, as a standard part of the designer's toolkit.

Someone once said that perhaps the answer might be that the better amp actually adds less distortion in key areas of the reproduction, making it easier for the ear/brain to decipher and understand the musical content; but I can't remember now where I came across that ...

Frank
 

fas42

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From http://www.whatsbestforum.com/showt...l-a-Preference&p=106347&viewfull=1#post106347 ...

How could it?? I my mind we proably have at least what it takes for the electronics to be neutral. The issue is you can't replicate the sound field generated at a live event with any accuracy as it is always moving a target that changes form seat to seat and of course differemt venues.

The acoustics of the real event are missing. Without them you have no chance of fooling your brain. It doesn't sound right because it's just the shell of the live performance with the wrong spacial clues from your room.
But, and the really big but is, that the acoustics of the event are not missing. They are there, very much intact, buried within the distortion, noise if you will, of a high percentage of audio systems. Only when you experience a system capable of revealing those acoustics clues clearly enough do you realise that the information was there all along, but it was effectively hidden by your ear/brain rejecting that level of detail, because it was too confusing for your mind to take in, while mixed in with too high a level of reproduction distortion.

Once your listening mechanism is able to recover that information then the "fooling" does take place, the illusion does form, and the acoustic properties of the listening room are usurped most effectively. My experience is that there is almost no limit as to how convincing the sensation of being at the recorded event can become, depending totally on the state of tune of the playback system ...

Frank
 

fas42

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From http://www.whatsbestforum.com/showt...thoughts-.-.-.&p=105724&viewfull=1#post105724 ...

Here is the Vivid G2, aluminum dome with a unique dome profile. Clean operation to 20kHz (refer to listening window):
http://www.soundstagenetwork.com/ind...d=77&Itemid=18

Here is a Magico V2 with a soft-dome ring-radiator, again with clean response to 20kHz:
http://www.soundstagenetwork.com/mea...ers/magico_v2/

Here is a WATT/Puppy 8. You can see the break-up starting at 20kHz:
http://www.soundstagenetwork.com/mea...on_wattpuppy8/

Focus FS8, with a soft-dome ring radiator, clean to 20kHz:
http://www.soundstagenetwork.com/mea...ers/focus_fs8/

Volent VL-2, with a ribbon tweeter, breaking up at 20kHz:
http://www.soundstagenetwork.com/ind...d=77&Itemid=18

Audio Physic Virgo 25, ceramic-coated aluminum, breaking up at 20kHz:
http://www.soundstagenetwork.com/ind...d=77&Itemid=18

The Revel Salon2, with a SOTA Be tweeter, clean to 20kHz:
http://www.soundstagenetwork.com/mea...ultima_salon2/
Very impressive set of measurements, in terms of the level of information there. And two speakers particularly stand out with regard to the most important performance parameter of all: distortion. The Wilson and the Vivid cover the crucial range clean as a whistle, and strangely enough, these brands are very highly thought of in some quarters :b. What the hangup with 20kHz behaviour is all about I'm not quite sure, what counts is that the speakers perform extremely well in the region where the music is.

The distortion from those speakers, in of themselves, at normal listening levels should be inaudible: quite a contradiction to those who obsess about the speaker component being the major flaw that drags the possible sound quality down, making it impossible to experience realistic sound via such ...

Frank
 

Thomas.Dennehy

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Well, it always helps to do a little research as to why albums have a certain sound, from http://en.wikipedia.org/wiki/Led_Zeppelin_%28album%29:

At the risk of being unpleasant, I have a hard time with the number of cases where wikipedia is cited as an authoritative source in this forum. I thought we were a higher form of weasel (as David Letterman once characterized GE management).
 

fas42

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At the risk of being unpleasant, I have a hard time with the number of cases where wikipedia is cited as an authoritative source in this forum. I thought we were a higher form of weasel (as David Letterman once characterized GE management).
Well, it's a section which quotes other sources for those points: if you are aware of an alternate explanation, or one that disputes this story I would be pleased to be made aware of it. Listening to the album, the explanations make excellent sense -- it's full of experimentation with echo to create large, even huge, apparent acoustic spaces.

And no prob's with "pleasantness" -- Wikipedia is just a convenient stepping off point to accessing a bigger picture regarding some concept: ultimately, there is no authority on any matter, it's always a moving ship ...

Frank
 

fas42

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From http://www.whatsbestforum.com/showt...-audio-with-me&p=106905&viewfull=1#post106905 ...

I've just landed on your planet and brought my alien views of audio with me


Greetings audiophiles and professional sound engineers. I've observed your planet for many years and decided to pay it a visit, hopefully an extended and pleasant one. However, don't be surprised at what for you will be at times unconventional and even provocative points of view based on my own training and experience. They are not intended to anger anyone, merely an exchange of ideas. I've observed that unfortunately some here hold so tenaciously to their own ideas that they see any challenge to them as a deliberate personal affront. None is intended.​

Welcome Soundminded! You sound like my kind of guy .... who knows, there may be some overlap of thinking here -- I for one shall be very interested in what you have to say ...

Frank
 

fas42

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From http://www.jensen-transformers.com/faqs.html:

Jensen transformers improve signal quality by removing hum, buzz and interference signals of other types (such as radio frequency interference) from the audio signal. The Bessel low pass filtering effect also removes ultrasonic distortion products generated by previous amplification stages from the audio signal. These ultrasonic distortion products create additional intermodulation distortion products when amplified by succeeding stages. These signals are folded back into the audible frequency range, generating an audio modulated, non-harmonically related noise floor. This type of noise is characterized by listeners as a "veil" in front of the music. The term "Spectral Contamination" was coined for this effect by Deane Jensen and Gary Sokolich in their 1988 AES Paper titled "SPECTRAL CONTAMINATION MEASUREMENT". Copies of this paper are available from the Audio Engineering Society and from Jensen Transformers, Inc.
Thanks for pointing me to this material: this is other people's take on my notorious low level, high frequency distortion. A few academics have, or are thinking in the correct directions, another recent variant is A New Method for Measuring Distortion Using a Multitone Stimulus and Noncoherence, see https://secure.aes.org/forum/pubs/journal/?ID=4 , interesting comments ...

Frank
 

fas42

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From http://www.whatsbestforum.com/showt...Meridian-808.3&p=107144&viewfull=1#post107144 ...

The retrieval of the most fleeting of transients and the minutest low-level detail is really astounding. I have been looking for this kind of sound ever since I began this hobby many years ago. But each time I upgraded my components, I knew there was still something missing. I knew there was just something more. This now has been met by the Meridian 808.3. I can't tell you how relieved and elated I am.

Because of the apodising filter, I love putting in CDs that are poorly recorded/mastered into the 808.3 and listen to it do its job. The upper registers are no longer harsh to my ears. Very easy to test this one. With the Esoteric, when the treble gets harsh, my right eardrum will buzz which can be rather discomforting. Now with the Meridian, there's hardly any buzzing. So it's true. The apodising filter has removed the pre-ringing, not only during playback, but the pre-ringing introduced during the ADC stage of the recording/mastering process. Vocals and instruments are more three-dimensional than before and more analog sounding. But I don't mean that the 808.3 has rolled-off or smoothen the high frequencies. By no means. In fact, vocals and instruments have more bite but without the grain, glare, grunge and the hard CD sound.
Ah, sounds like another happy customer getting on board the "you can get good sound from bad CDs" train. There will come a day when even poor Tim no longer has the energy to swat all these annoying insects suffering audio delusions out of their misery, the swarm may have just got a little too big to handle even for him ...

Frank
 

fas42

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From http://www.whatsbestforum.com/showt...ar-differently&p=107160&viewfull=1#post107160 ...

The stubborn, fantasy-based defense of bad fidelity is a destructive force for all of the above.
Couldn't have said it better myself. Trouble is, Tim and many others are locked into the belief that frequency response (linear distortion) defines fidelity; I and some others believe that non-linear distortion are what it's about -- that's where the "magic" is, by reducing the latter by any means. Over and over again, the pattern repeats, a speaker/system that measures terribly in areas of FR, but just "works" for the listener. One thing that is almost never done in these situations is to do truly meaningful measurements on the non-linear side because it's "too hard, too expensive, ..."

And so the "fight" continues ...

Frank
 

Soundminded

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But, and the really big but is, that the acoustics of the event are not missing. They are there, very much intact, buried within the distortion, noise if you will, of a high percentage of audio systems. Only when you experience a system capable of revealing those acoustics clues clearly enough do you realise that the information was there all along, but it was effectively hidden by your ear/brain rejecting that level of detail, because it was too confusing for your mind to take in, while mixed in with too high a level of reproduction distortion.

Once your listening mechanism is able to recover that information then the "fooling" does take place, the illusion does form, and the acoustic properties of the listening room are usurped most effectively. My experience is that there is almost no limit as to how convincing the sensation of being at the recorded event can become, depending totally on the state of tune of the playback system ...

Frank

Is this a private war or can anyone jump in? ;)

Actually there is a lot missing. First of all frequency response must be flat, not just for the playback system but overall for the entire recording/playback system all the way back to the recording microphone. For the sound to have the same timbre it would have if the source were in the listening room, it would have to have the same spatial propagation characteristics as a function of solid angle of propagation as the instrument. No commercial speaker system comes remotely close. Not only that, every musical instrument is different. However, to have the same timbre as the microphone heard, not only would the sound of the first arrival from the loudspeakers need to be adjusted flat back to the recording microphone, all early reflections from the general direction of the speaker would have to be too. There are no speakers designed to meet that criteria either.

That was the easy part. The hard part is duplicating the timbre as it would be heard at the live venue. To do that, the acoustics of the venue must be duplicated because the spectral content of each note changes as the sound dies out by a ratio of around 2:1 when the sound heard at 8 Khz is compared to the sound at 1 Khz. This is explained as the RT for a typical hall being around 2 seconds at 1 khz, 1 second at 8 khz. This affects the tonality by preserving the initial transient attack while mellowing the decaying sound. In short, if you don't reproduce all of the reverberation you cannot reproduce the tonality, they are different subjective aspects of the same phenomenon. The only type of sound recording/playback system that can do that is a binaural recording made with a dummy head placed where the listener would be sitting. Unfortunatlely that system is well known to be fatally flawed for different reasons but it will capture and reproduce the timbre of acoustic instruments as they are heard live.
 

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