Good analyzer photo’s Richard. I too have investigated the out of band energy coming out of a CD player. I am a big fan of filtering non-audio information.
I like the guys that have a non-over sampling DAC and then use little or no filtering and say “well, you can’t hear it and the tweeter can’t reproduce it so why worry about it?”
"York", by Tannoy, with a 12" Dual Concentric.
But those were not mine, I put them up for show because of the price tag.
Mine were from the 50's and looked more like the one below, but with more scars.
An elderly gentleman, employee of Tannoy 40 years ago helped me ID and date them.
Mine was a special broadcast (limiters off) of 2 mic 15 ips tapes played over the air (FM) recorded at Symphony Hall Boston by Victor Campos. Even tweaked to the max my Luxman T110 tuner was 72dB SNR at best but the "spaces" between things that they like to talk about was black.
So much discussion about a fundamentally flawed medium........my investigations and loopback recordings prove to my satisfaction that the particular vinyl formulation used for pressings, in and of itself imparts individual and identifiable sonic 'character'. With this knowledge in mind it is evident that Phono playback is a total 'crapshoot'.......once the mechanics, the pickup, the RIAA amplification etc are perfected the glaring elephant in the room is the fact that different vinyl pressings cause intrinsic and characteristic sound signature according to Label......`and it is known that Labels jealously guarded their secret vinyl 'recipes'. Do some records sound overly 'smooth', some records sound 'shouty', some records sound overly 'bright' etc ?.......the recording mastering is not totally to blame, the vinyl formulation has extra and 'final' influence. Digital replaces this vinyl formulation dependency with other dependencies like clocking instabilities but this dependency can be solved and rendered constant unlike vinyl formulation dependency. Just sayin'.
Dan.
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Can't I buy extra copies of a few particularly good LP's and cut them up and sprinkle them about to fix the problem? Synergistic should get on this.
I visited Akihabara about once a week when I lived there in the mid 8ies last century. I must have been in the same store because I know exactly what you mean. Prices over 1 million yen iirc.
Subsequently I was able to pick up a pair of K3838s on another continent for 700 USD and have been playing them for many years. What was said about the xover is true I'm afraid. Well designed but poorly executed. Rotational switches are a pain.
However, much better loudspeakers have arrived since and I haven't listened to them for a decade.
yes Know what you mean.
-RM
Well, that's a bummer, we traveled in similar circles, but I never met him. I heard that some of the heads I designed for the Studer A80/820 were sold into the UK, and I always wondered if he got them. They required a very different repro and record eq, as well as tension servo mods and not many studio engineers could handle the mods.
Studer had great stable mechanics, heads and amps, not so much...I had fun grafting Nak 1000ZXL heads and custom repro eq amps onto a Studer A80-QC machine for QC work in the plant. eq'ed flat from 20-24k +/- .5 dB. Higher wow and flutter than the 1000ZXL though...
I am afeared I date meself...
Howie
No I dont think they repurpose them. It is said that a fire destroyed them. But I suspect apathy towards preservation. The companies do not respond to enquiry. Irony is due to vinyl revival companies here have remastered audio cds to vinyl and die hard fans love them. It is also rumored that due to lack of preservation some audio cd albums were produced from MP3 either that or some one botched up the remastering as some audio cds sound horrible.
Do they re-purpose them? Long ago, when I was a student, I use to buy used tapes from the Swiss radio: it was a great deal even though I had to re-bias because of the strange formulations.
I do hope the more "global" artists like Anoushka Shankar take better care of their legacy.
Regards.
Could you prove that SIR?https://www.diyaudio.com/forums/the...lowtorch-preamplifier-ii-490.html#post2244572
"What I found reinforced a basic fact that many engineers (myself included
Using the Dolby™ B-Type codec, a single tone at 3KHz could be easily discerned in the noise floor at -115dB record level re: 250nWb/M. The HP also clearly showed the energy above the noise floor at 3KHz. A casual examination reveals why; at the -60dB noise level specification quoted for a cassette track at 1.875IPS, the total energy in the noise floor close enough in frequency to mask 3KHz is as much as 60dB lower. This masking range is of course referred to as a critical band, and is quite variable from individual to individual depending on the density of sensory cells in the cochlea. (this is why I do not trust the "average" masking profile upon which mp3 and other lossy data reduction codecs are modelled). BTW, a good 75% of everyone at that ITA conference could hear the -115 tone in the noise floor as well.
The result of my investigation was that (dither as a separate subject) 14 bits was definitely not sufficient, indeed even 16 bits was not enough to fully utilize the dynamic range of even an analog compact cassette."
Howie
I mostly listen to North Indian (Hindustani) Classical Vocal. Scott Wurcer has very good observation about sound quality of indian vinyls. I suppose we didn't had good equipments and small no of professionals in those days (read about george harrison 'wonderwall' album which had some indian music tracks recorded in Bombay) I do have few Indian classical instrumental. here are links. These are my personal choices and I only keep music which I like and sound good in my system.
Ram Narain - Sarangi Solo (Vinyl, LP, Album, Stereo) | Discogs
Hariprasad Chaurasia - Flute Fantasy (Vinyl, LP, Stereo) | Discogs
Pandit Shiv Kumar Sharma - Classical Melodies On The Santoor (Vinyl, LP, Stereo) | Discogs
Alla Rakha And Zakir Hussain - Percussion From India, Tabla In Solo And Duet (Vinyl, LP, Stereo) | Discogs
https://www.discogs.com/Pannalal-Ghosh-Raag-Yaman-Raag-Shri/release/6532153
Carnatic classical I would say is true indian origin music. As north indian classical was influenced by Moghuls. I will ask on Indian forum for carnatic Classical.
Some albums like of Ravi Shankar were specially recorded in USA and Some in UK and France. I had them but I dont listen to them so have not kept but vinyls sound quality and material was good if I remember.
Best Regards.
I think both Indian and Western Classical have their roots in religious music. Thats where it started I suppose long back. I hardly understand technical aspects of classical music but I listen to what sounds good to me. Sometimes I do listen to western classical though I hardly understand the finer naunces of it.
Regards.
Music 'genre' is such a thing some like it and some may not and some may find it even ridiculous. The link is of a typical bollywood movie song with major emphasis on melody. Yes I do listen to hindi film music of those days (60s, 70s). Comfort is, in those days film music was loosely based in structure of Indian classical music with some well experienced music directors and singers who had their training in indian classical. I can not say same for modern indian film music. The music you like in the link you gave have some Bengali (Eastern part of the country) influence too.
regards
regards
Yes - People forget just how good FM can be despite the fact that’s is band limited to about 15 kHz. Everything here has gone to DAB but I heard they had decided not to turn FM off for the foreseeable future.
I have missed the message you quoted, but, at your question, I will answer: If the subject interest-you so much, why don't you try to figure out your own thresholds ? If you do-it with music, I bet you will have a big surprise.
I wonder why, after so many years of mistakes (ex:MP3 and even CDs) nobody took the charge to make serious studies about average (and limit) human listening thresholds on signal/noise, harmonique distortions, IM distortions, bandwidths, phases turns (variation of group delay). With musical signals, because our brain is not made to discriminate sinusoidal or continuous signals that don't exists often in the nature and that we tend to suppress from our listening impressions.
Well...I'm from another part of the world...I have no idea about Indian history or Indian culture other than through some old movies and songs i saw when i was a child to be honest.I lived for 2 months in an indian neighbourhood in London so there it was the first time i saw real indians too...I was impressed by the fact that indians got all the easy and well payed jobs in the UK too...
that quote is from 2010 and it struck me because i can't hear anything, i mean not a damn thing over the -84db SNR of a sony cassette player when dolby s is on. It's like telling that Ray Dolby was a dumb stupid guy...if i'm hearing -115db ...i simply don't believe it, period.
If they claim that the cd player had 96db and a few db of dither , did they ever heard the dither itself or instead the pumping effect due to the i/v transconductance stage when the signals are about -70...-75db and higher? I think that people are really wrong here telling that they hear the dither itself.
They take the noise of the i/v stage at high gains combined with the distortions of that stage at high input signals which behave pretty much like DBX breathing effect as dither, but they can't really hear the real dither. At least that is what i believe...
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