How can I tell music has been an MP3? Quantitative Measurement of Fidelity
 

"Dave" wrote ...

Have there been no bright PhD students sponsored by the music
industry, or are they too busy with their revenue stream? The noise
is what is not the notes. For a symphony you have an idea of what the
notes should be, because you have the sheet music, and you know what a
violin, flute etc should sound like. You may be able to measure
something more because that is what the brain does.

"Music is the space between the notes."
-- Franz Liszt


--
"C'est un Nagra. C'est suisse, et tres, tres precis."

How can I tell music has been an MP3? Quantitative Measurement of Fidelity
 

Colin B. wrote:

I'd suggest that this isn't a recent phenomenon. I've got plenty of pop
vinyl from the 1970s and 1980s that has roughly no dynamics. Making crap
sound louder on the radio at the complete expense of quality is decades old.

That vinyl was pumped to hell and back with massive compression, BUT it
wasn't aggressively limited as well, because aggressive limiting didn't
really improve loudness on vinyl much.

Today with the CD there is a hard limit for level, and so you hear a lot of
heavy peak limiting today. That's more destructive to the overall sound.
The combination of the two is an absolute killer.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

How can I tell music has been an MP3? Quantitative Measurement of Fidelity
 

Serge Auckland wrote:

That's like asking if there's a computer program to confirm a wine is of
poor quality, or a piece of art work is of poor quality.

Precisely, and if you could do such a thing effectively in a way that would
correlate with human judgement, you could probably get a Turing award if
not a Nobel.
--scott


--
"C'est un Nagra. C'est suisse, et tres, tres precis."

How can I tell music has been an MP3? Quantitative Measurement of Fidelity
 

"Mr.T" MrT@home wrote in message
u...

"Paul Stamler" wrote in message
...
Some labels, including Pathe, did put out center-start records during
the
78
era. Some radio transcriptions were done that way, too. And radio
transcriptions of long shows were sometimes done alternating
center-start
and rim-start, so there would be no jarring change in sound quality as
the
operator switched from disc to disc.

I can just imagine that operator sometimes got confused which way was next
then :-)
Even if they are well marked, it's surely a recipe for disaster.

The disaster would be short-lived and not on the air; a disc that's cut
center-out can't be cued up at the outside rim, as the groove is going in
the wrong direction. (Vice versa, of course.) So the operator would realize
the error during the cue-up process, which would typically be done as soon
as the previous changeover had been accomplished..

Peace,
Paul

How can I tell music has been an MP3? Quantitative Measurement of Fidelity
 

Classical 78 sets came out in two numbering schemes:

Manual - 1/2, 3/4, 5/6, 7/8

Automatic - 1/8, 2/7, 3/6, 4/5

For an automatic album, you used a changer and stacked the discs in order,
with 1 on the bottom and 4 on the top. When 4 was done, you flipped the
stack and played through to the end.

If someone was playing the discs on air, or in a "gramophone concert",
they'd need to either have two copies of the 4/5 disc or do some sort of a
break (commercial, commentary, etc.). But this very seldom happened, at
least in the USA; classical music on air, when it happened, was mostly live
up until the LP era. And we didn't have gramophone concerts much here.

As to who had the money for two turntables -- radio stations, that's who.
Before satellite networks, when microwave links and equalized phone lines
were the norm, some programs went out on transcription discs, 33-1/3
coarse-groove, 15 minutes per segment.

Peace,
Paul

How can I tell music has been an MP3? Quantitative Measurement of Fidelity
 

On Jun 26, 7:54 am, (Scott Dorsey) wrote:
"Dave" wrote ...



Have there been no bright PhD students sponsored by the music
industry, or are they too busy with their revenue stream? The noise
is what is not the notes. For a symphony you have an idea of what the
notes should be, because you have the sheet music, and you know what a
violin, flute etc should sound like. You may be able to measure
something more because that is what the brain does.

"Music is the space between the notes."
-- Franz Liszt

--
"C'est un Nagra. C'est suisse, et tres, tres precis."



I thought that "Music is the space between the notes." was John Cage,
but more research seems to attribute it to Claude Debussy. I would
imagine that it has been paraphrased a few times by other people.

How can I tell music has been an MP3? Quantitative Measurement of Fidelity
 

"Paul Stamler" wrote in message
...
Classical 78 sets came out in two numbering schemes:

Manual - 1/2, 3/4, 5/6, 7/8

Automatic - 1/8, 2/7, 3/6, 4/5

For an automatic album, you used a changer and stacked the discs in
order,
with 1 on the bottom and 4 on the top. When 4 was done, you flipped
the
stack and played through to the end.

If someone was playing the discs on air, or in a "gramophone concert",
they'd need to either have two copies of the 4/5 disc or do some sort
of a
break (commercial, commentary, etc.). But this very seldom happened,
at
least in the USA; classical music on air, when it happened, was mostly
live
up until the LP era. And we didn't have gramophone concerts much here.



I grew up in what was then a small village (in the UK) and I'm pretty
certain 'gramophone concerts' were held in the village hall from time to
time, but that would have been before I was old enough to go. The
nearest I got was 'music lessons' in the primary school I attended when
the headmaster played records to us and although I can't remember the
record player (gramophone?) too clearly, I'm certain it wasn't an
autochanger. I do vividly remember the music though - stuff like
Greensleeves, Grieg (Peer Gynt) and various Ketelbey tunes.

Anyway, this got me interested to Google and I found this site:

http://www.cph.rcm.ac.uk/MusicRoom/070115Summary.htm

There are some very interesting references and observations, including
the notion that the so-called 'WAF' is nearly 100 years old and I
particularly like this bit: "To catch a friend listening to the
gramophone alone would be equivalent to finding them 'sniffing cocaine'."

:-)

How can I tell music has been an MP3? Quantitative Measurement of Fidelity
 

In article .com,
says...


I have been disappointed with the audio quality of some CDs I have
bought recently. Is there a free program I can use to get an accepted
measurement of fidelity? (like a signal to noise ratio)

I have my suspicious that some may have been stored an MP3s and then
"unripped" in the factory. So how can I tell for certain if my CD has
been an MP3, or other lossy format? I'd hope mp3 storage would leave
different markers than the original tape, for example.

To get a good measure I'd expect some Fourier transforms and signal
analysis to be done, so this should be relevant to sci.physics.


http://www.hydrogenaudio.org/forums/...howtopic=34845

http://www.carnet.hr/CUC/cuc2004/pro...da/b1_full.pdf

http://opticom.de/

How can I tell music has been an MP3? Quantitative Measurement of Fidelity
 

"Keith G" wrote in message
...
Not as confusing as numbering 2-disc sets of LPs 1/4 and 2/3 for public
performance - where the playing order goes/went as follows:
Stack the albums with sides in this order from the top: 1/4, 3/2
Play Side 1, flip both discs together
Play Side 2, flip top disc only
Play Side 3, remove top disc
Play Side 4, remove disc, take bow, bring up house lights....

Yes totally stupid, those with 2 decks want disks 1/3 and 2/4 so the change
can be seamless.

MrT.

How can I tell music has been an MP3? Quantitative Measurement of Fidelity
 

"Carey Carlan" wrote in message
...
1/4 & 2/3 is designed for automatic record changers. Put the stack on the
changer. 1 drops first, then 2. Flip the two-record stack and put it
back
on the changer. 3 will drop, then 4.

Makes sense then.
Never had an automatic changer myself though, and I have never seen any disk
sets manufactured in Aus to that format.

MrT.