OT: Digitizing My LP Collection

Jan Panteltje expounded in news:islc3d$s2f$ snipped-for-privacy@news.albasani.net:

You have proven that you have crap for ears. 8->

Warren

Reply to
Warren
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On a sunny day (Tue, 7 Jun 2011 14:58:04 +0000 (UTC)) it happened Warren wrote in :

As usual it becomes insults when you cannot come up with numbers and experiments. So bye

Reply to
Jan Panteltje

Jan Panteltje expounded in news:islk2d$fkc$ snipped-for-privacy@news.albasani.net:

Just pointing out that it doesn't take genius to hear the difference. YMMV.

Warren

Reply to
Warren

Let alone crap for brains for not knowing why it is a bad choice.

Reply to
Spurious Response

Priceless.

Reply to
GooseMan

Now here again you are wrong. I'm pretty sure you can read so perhaps it is a related comprehension error.

Since FLAC reduces a wave file to about 50% of it's former size it is obvious that it does not just compress the "dead space" as you call it now. Previously you claimed it just compressed the "silence" so I assume you are using those terms interchangeably. It does much more than that.

If you read about FLAC you would have come across this description from the FLAC home pages

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INTER-CHANNEL DECORRELATION

In the case of stereo input, once the data is blocked it is optionally passed through an inter-channel decorrelation stage. The left and right channels are converted to center and side channels through the following transformation: mid = (left + right) / 2, side = left - right. This is a lossless process, unlike joint stereo. For normal CD audio this can result in significant extra compression. flac has two options for this:

-m always compresses both the left-right and mid-side versions of the block and takes the smallest frame, and -M, which adaptively switches between left-right and mid-side.

MODELING

In the next stage, the encoder tries to approximate the signal with a function in such a way that when the approximation is subracted, the result (called the residual, residue, or error) requires fewer bits-per-sample to encode. The function's parameters also have to be transmitted so they should not be so complex as to eat up the savings. FLAC has two methods of forming approximations: 1) fitting a simple polynomial to the signal; and 2) general linear predictive coding (LPC). I will not go into the details here, only some generalities that involve the encoding options.

First, fixed polynomial prediction (specified with -l 0) is much faster, but less accurate than LPC. The higher the maximum LPC order, the slower, but more accurate, the model will be. However, there are diminishing returns with increasing orders. Also, at some point (usually around order 9) the part of the encoder that guesses what is the best order to use will start to get it wrong and the compression will actually decrease slightly; at that point you will have to you will have to use the exhaustive search option -e to overcome this, which is significantly slower.

Second, the parameters for the fixed predictors can be transmitted in 3 bits whereas the parameters for the LPC model depend on the bits-per-sample and LPC order. This means the frame header length varies depending on the method and order you choose and can affect the optimal block size.

RESIDUAL CODING

Once the model is generated, the encoder subracts the approximation from the original signal to get the residual (error) signal. The error signal is then losslessly coded. To do this, FLAC takes advantage of the fact that the error signal generally has a Laplacian (two-sided geometric) distribution, and that there are a set of special Huffman codes called Rice codes that can be used to efficiently encode these kind of signals quickly and without needing a dictionary.

Rice coding involves finding a single parameter that matches a signal's distribution, then using that parameter to generate the codes. As the distribution changes, the optimal parameter changes, so FLAC supports a method that allows the parameter to change as needed. The residual can be broken into several contexts or partitions, each with it's own Rice parameter. flac allows you to specify how the partitioning is done with the -r option. The residual can be broken into 2^n partitions, by using the option -r n,n. The parameter n is called the partition order. Furthermore, the encoder can be made to search through m to n partition orders, taking the best one, by specifying -r m,n. Generally, the choice of n does not affect encoding speed but m,n does. The larger the difference between m and n, the more time it will take the encoder to search for the best order. The block size will also affect the optimal order.

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I am sorry but you are wrong again.

Reply to
David Eather

But you must admit it is fun to watch him scramble to find a way to hide his own mistakes!

Reply to
David Eather

On a sunny day (Wed, 08 Jun 2011 13:11:09 +1000) it happened David Eather wrote in :

This is actually fun, Long time ago somebody in a Linux newsgroup asked me if one could make a system that would send stereo, but if bandwidth was an issue fall back on mono, all in little bandwidth of course. So I came up with the idea of sending the difference (between left and right) on a separate channel (like in FM broadcasts on the subcarrier), but I used mp3 for the base (sum) and also mp3 for the difference channel.

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One would perhaps not expect this to work, but it works increadibly well.

Reply to
Jan Panteltje

=46rom my own battles, i am working my way through about 300 LPs worth.

As always, good sound always starts at the beginning, the turntable, cartridge and stylus. Clean the records thoroughly before digitizing. I let my LPs rest for a day or more between attempts. Since you have a calendar budget, schedule about twice the time you think you need.

Use a good phono pre-amp straight to the digitizer (card or external); = and leave some headroom for envelope peaks. 24-bit is not very expensive and allows more headroom while maintaining good linearity and SINAD. For final formal listening, SACD is quite enough (even 16-bit wav/CDDA is = fine for most people most of the time), and for general listening high bit = rate MP3/ogg ain't too bad and is usefully smaller files.

Audacity is very nice. If you have the $$$$, DiamondCut is both more powerful or easier to use (though not at the same time).

Reply to
josephkk

Internet.

No it hasn't. Try finding "Space and Creation" by Alice Coltrane. Vinyl is still available.

Reply to
josephkk

website,

One GB??? Snno-o-ort. The bulk of my digitized collection is over 200 GB expresses as FLAC. Replicated in three places. Plus a few hundred = CDs (masters).

Reply to
josephkk

Eather

in:

and

me.

learn.

the past.

=20

A few times, OK. Maybe even several times. But the same errors for = years on end? That is soo past boring.

Reply to
josephkk

Some new recordings are still being released on vinyl.

--
It's easy to think outside the box, when you have a cutting torch.
Reply to
Michael A. Terrell

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VLV

Reply to
Vladimir Vassilevsky

in:

past.

Sorry. This is my first, first hand encounter with always wrong - at first I thought GooseMan was just a common overstimulated juvenile but then it became obvious who it was. Like I said, my first encounter.

Reply to
David Eather

in:

past.

You are so full of shit.

You have had discourse with me several times in the past 7 years.

You are just too goddamned dumb to retain anything... Other than that ten pound wad of stink you carry around every day.

I am sure you'll be quite a pain in the ass to clean up after when you croak.

Reply to
Sum Ting Wong

in:

past.

Your feces fetish is showing again.

Reply to
John S

in:

past.

I don't know how that can be since I have been posting on SED for only a year or two.

Yet again you live up to your name!

Reply to
David Eather

in:

past.

Idiot. This is not the only group I have posted in.

Likely one of your failures in the physics group I chimed upon.

Reply to
Sum Ting Wong

in:

past.

Yep! Much more than Some Ting Wong, he's AlwaysWrong.

Reply to
krw

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