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Info Wanted: Some questions about converting vinyl records to digital.... — Page 3

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Jetrell Fo said:



I have an external sound card and a tube pre-amp. 

I adjust the pre-amp for gain and then I use louder tracks on the vinyl to adjust the sound card while keeping an eye in adobe audition.  Once I get the louder tracks recording levels adjusted I usually am able to find my safety zone.  I never let anything go in the red but that is preference.  I believe once or twice here and there isn't an issue as you can compensate for that later but I prefer to try and limit any digital/software processing by adjusting the hardware so it can do what it is made to do.......

 

So you are using a computer...sorry, I didn't get that before. :-)

What did you mean by:

"Be careful, it's always a possibility that your receiver may be re-sampling your audio signal."

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JediTray said:
I think I'm going to save up and buy the DAK kit again.  I'm also thinking that, although it might be redundant, that I would try an RCA to USB converter.  My thinking is that, if my sound card was part of the problem, then the sound could be converted to digital via USB, rather than the 3/5mm input on the sound card.  The only restriction I see so far is that the one I linked to is 16 bit only.


Was the majority of the surface noise you heard in the recordings, or did you also hear it when you were listening to your LPs, prior to recording?

If so, could it have been that the cartridge you were using just wasn't up to snuff? Sometimes the simplest solution is the correct one. Since the cartridge is the only thing that comes in contact with the LP other than the rubber mat, you might just want to go for a different brand of cartridge than the one you used before, or splurge and get one of a higher quality. I don't think the quality of the cartridge can be over stated. Your records are in good condition, they're clean, so I can't think of anything else in the analog realm that would account for the surface noise.

I'm sorry, I am a Luddite when it comes to music+computers. I don't even own an MP3 player. ;-)

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What he means by resampling your audio signal, IIRC, is the fact that some amplifiers, especially digital ones, could be actually copying and breaking down analog signals before they make it to the speakers or other outputs/inputs for recording.  It's kinda like what a CD player does when converting the digital information into analog sound when connected via the old school RCA cable.

As far as the "noise"....

You know, the more I think about it, the more I think that I was being too harsh and expecting way too much from an old (but loved) format.  As I said before, it wasn't necessarily audible, but it showed on my level meters on the computer.  I just think the meters in the software are set for pure digital sources, so the "noise" seems to be more pronounced.  I am going to get the kit again, do a few things differently, and get the job done the way I want to do it.  I honestly think the next time I get into it, the results will be worth it.

Of course, I still welcome any input from folks out there that are into this kind of thing.  :)

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JediTray said:
What he means by resampling your audio signal, IIRC, is the fact that some amplifiers, especially digital ones, could be actually copying and breaking down analog signals before they make it to the speakers or other outputs/inputs for recording.
That finally occurred to me- I forgot that there are digital receivers in the world now. Mine is a very analog 13-year-old 2-channel receiver that I specifically bought because it had a good phono stage, so no worries there. ;-)


JediTray said:
You know, the more I think about it, the more I think that I was being too harsh and expecting way too much from an old (but loved) format. As I said before, it wasn't necessarily audible, but it showed on my level meters on the computer. I just think the meters in the software are set for pure digital sources, so the "noise" seems to be more pronounced. I am going to get the kit again, do a few things differently, and get the job done the way I want to do it. I honestly think the next time I get into it, the results will be worth it.
We all have been spoiled by the cleanliness of digital sound- even us 70's kids. Impossible to avoid, I guess.

Still, the results are definitely worth it. I really enjoy the CD recordings I've made of my old LPs and 45s, and there's stuff I just listen to a whole lot more now because it's just so much more convenient to have things in an accessible digital format.

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lol.  I've been spoiled rotten by having a digital receiver--mainly because I love being able to transmit Dolby AC3 and DTS signals to it directly via s/pdif.  Goodbye, forced dynamic range compression, hello 5.1 sound!

For music I suppose your connection type depends what component of the system has the best digital-to-analog conversion, and whether you want to use something like Dolby Prologic II music mode or standard stereo.

Though it may be considered a blasphemy by certain extreme audio snobs, I'm pretty much convinced that digital sound is not inherently inferior to analog as is often maintained.  Most of the perceived shortcomings can be explained through other factors, such as poor quality mastering or mixing, too much unnecessary processing (noise reduction eating up detail, etc), the loudness war robbing the sound of any impact or variation, things along those lines.

But when handled properly, digital sound can be extremely satisfying.  Take 7FN's Star Wars LP transfers for example--a high quality preservation of a great sounding source made in 24/96 (having a high resolution at the start is very important), then converted to 16/44.1 for use on cd's.  The sound didn't suddenly become inferior just because it was digital and not on vinyl anymore--the good condition of the records and the great sounding mix ensures that it retains its excellence in any format.  Or look at anything that Steve Hoffman has mastered--he is able to derive a sound that is actually superior to the LP versions, because he uses the original master tapes, which have the least generation loss, and a dynamic range and EQ that the LP format could not handle, but which digital formats can represent with ease.  And of course, any well-mastered present day recordings (yes, they do exist) are going to sound great.

No, the problem with digital has nothing to do with the qualities of the format itself, but the multitude of tools and possibilities that are available to people who don't have the sense or good taste to know when to use them and when to leave things alone.  There has always been crappy sound and crappy engineering, but present day trends unfortunately exaggerate it.

I realise that was only partially on topic, but I reckon it's something that ought to be said.  ;)

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hairy_hen said:

 

... Or look at anything that Steve Hoffman has mastered--he is able to derive a sound that is actually superior to the LP versions...

 

Having myself done the exact same thing I did for the "Audiophile Edition" with "Raiders Of The Lost Ark" (excepted I've not overlaid the tracks), allow me to say that passage from your post was funny to read. The Polydor once entirely pitch corrected and remastered blows the DCC hands down, if only one or two tracks due to the mixing. Hahaha ! :)

You won't be able to judge the potential of a recording if you ignore the EQ's. IMHO. POTENTIAL!... No matter how it looks to sound at first.

 

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True that.

I think what I am going to do is get the equipment again, record the vinyl, and make it available completely raw.  No processing of any kind, other than the conversion itself of course.  That way, it can be up to the persons that receive it to process it or do what they want.  Then, I will play with the raw files and test different things.  If anything turns out to be a keeper, I will make it available as well, separately.

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Unless of course somebody has a better idea for me.  :)

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JediTray said:

Looks like most of the external USB sound cards only have a 3/5mm input, and are 16 bit. 

6.3mm jacks are basically the music industry standard, so many of the more expensive soundcards will favor these connectors, cause they're mostly used by musicians...
But you can indeed get soundcards (USB also, or firewire) with any resolution, it's just a matter of money..

So I'd just be spinning my wheels that way too.  Instead of turntable-mixer-internal sound card, it would be turntable-mixer-external sound card-computer.

The sound is digitized in the soundcard, so any external soundcard->computer connection is purely digital. The idea with an external soundcard (or one with a breakout box) is simply to eliminate any noise/interference that might come from the computer itself. But to be honest I don't know if this is really a problem or is more academic? Has anyone measured this supposed interference on their soundcard? In any case most semi-pro soundcards are internal with external breakout box.

I don't know your budget, but here is one USB and one PCI soundcard that are (relatively) cheap and should be able to do what you want: M-Audio Delta Audiophile 2496 & Roland UA-1G.

 

The Monkey King - Uproar In heaven (1965) Restoration/Preservation Project

Nezha Conquers the Dragon King (1979) BBC 1.66:1 & Theatrical 2.35:1 preservations

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Thanks.  My current sound card is a Rocketfish 5.1 PCI that I installed myself, and I am very pleased with it.  As far as there being any computer noise, fat chance.  I know for absolute certain that any noise registering on the meters came from the turntable and there was no bleed from any computer fans or anything like that.  I am pretty much convinced that I can tackle this again when I get the equipment in a few months.  I will be providing samples of the raw data for you to listen to, then if any changes need to be made, I will go from there.  I figure between my knowledge and input from you folks that have done this, the end result will be great.

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This is probably unlikely to be a concern with your setup, but I've seen real life cases where noise was reduced by recording on a laptop running on battery power, rather than plugged in to the mains.

DE

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Wow.  Yeah, I can see how that would help in some situations.

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I will also be getting a direct drive turntable next time.

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Darth Editous said:

This is probably unlikely to be a concern with your setup, but I've seen real life cases where noise was reduced by recording on a laptop running on battery power, rather than plugged in to the mains.

DE

But that would probably 'just' be a lack of grounding, and not interference from other components.

The Monkey King - Uproar In heaven (1965) Restoration/Preservation Project

Nezha Conquers the Dragon King (1979) BBC 1.66:1 & Theatrical 2.35:1 preservations

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JediTray said:


I will also be getting a direct drive turntable next time.


Good move. I love mine. :-) I'll never understand the uber-audiophiles' penchant for belt-driven tables.

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Really?  I've always heard that direct drive was preferred.  Even when I worked in a music store back in the day, DJ's and enthusiasts alike preferred it.

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I don't really care about it and I wasn't planning on adding it to the project, but would anyone be interested in a vinyl recording of the TPM soundtrack?  It was the last Star Wars recording to get the vinyl treatment and I have it in my collection, so I thought I'd ask.

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JediTray said:
Really?  I've always heard that direct drive was preferred.  Even when I worked in a music store back in the day, DJ's and enthusiasts alike preferred it.
DJs.....definitely. People who read "The Absolute Sound"......probably not. Those $8,000+ turntables for which you have to buy a separate arm, are usually belt-driven. Their theory is that in direct-drives, the motor is too close to the LP as it is directly attached to the spindle and can adversely affect the sound.

The other school of thought (to which I subscribe) is that any motor rumble of a decent direct-drive is preferable to the speed inconsistency of a belt-drive.




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Whoops, having browser trouble....

I would rather have more stable pitch as well.

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Damn, apparently this forum doesn't like IE 9.

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JediTray said:


I would rather have more stable pitch as well.


Then a direct drive is the way to go. Most of them have a pitch adjustment control as well, which, unless you're a DJ, doesn't have much use (although I have found it useful for bootleg LPs that were mastered at the wrong speed).

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Yeah, I prefer to have control over the pitch for the same reason.  I haven't had a turntable that I couldn't adjust since I was a kid.

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I finally received my factory sealed Star Wars LP the other day, but I'm curious about a sticker on the shrinkwrap in the top left corner.  It reads 8666 H NDC.

Web searches have been fruitless.  Any ideas?