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Recording Signal attenuation questions



 
 
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  #1 (permalink)  
Old July 28th 04, 10:19 PM posted to uk.rec.audio
Keith G
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Posts: 7,388
Default Recording Signal attenuation questions


Guilty about the ludicrous number of gardening mags she consumes, Swim
bought me a couple of hifi comix yesterday (I'm actually so 'off them',
these days!) and in one of them I saw a mention that attenuation of signals
for computer recording purposes should be done 'pre-computer' because the
software 'volume sliders' wreck the sound quality.....???

Anyone care to confirm or deny this and would this mean it is best to leave
the sliders 'maxxed out' if one is attenuating 'pre computer'?

Anyhoo, moot AFAIAC, as I can not get a recording from my vinyl setup
without having the slider set at the absolute minimum or I get clipping, as
anyone who has bothered to listen to any of the wacky clips I post from time
to time**, will tell. So I'm plotting to construct a little attenuator which
I envisage as not much more than an Alps pot in a little box with phono
sockets IN and OUT, wired accordingly.

Too simple? Am I missing summat here? (Like everything you buy seems to have
a tiny little resistor stuck in it for some reason!)



**On that subject, I notice no-one has had a go at my truncated'name that
tune' clip:

http://www.apah69.dsl.pipex.com/keit...aughtybits.mp3

Too obscure or just too ****ty a recording, eh?

;-)




  #2 (permalink)  
Old July 29th 04, 01:43 AM posted to uk.rec.audio
Arny Krueger
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Posts: 3,850
Default Recording Signal attenuation questions

"Keith G" wrote in message


Guilty about the ludicrous number of gardening mags she consumes, Swim
bought me a couple of hifi comix yesterday (I'm actually so 'off
them', these days!) and in one of them I saw a mention that
attenuation of signals for computer recording purposes should be done
'pre-computer' because the software 'volume sliders' wreck the sound
quality.....???


Oh, boy.

Anyone care to confirm or deny this and would this mean it is best to
leave the sliders 'maxxed out' if one is attenuating 'pre computer'?


Keith I know you didn't say this, but I'd like to clarify a related point:
Potential myth number one might be that there is a inherent sound quality
advantage one way or the other between digital audio and computer audio.
There isn't.

To review, there are basically three ways to record audio digitally:

(1) A general purpose (PC, Apple) computer with a digital audio interface
and appropriate software
(2) A dedicated digital recorder e.g., A-DAT or hard drive recorder
(3) A DAW that is not obvioiusly based on a general-purpose computer.

In terms of potential for quality sound, they are all equal. In fact, a
goodly proportion of all modern hard drive recorders are actually
proprietary computers running an OS that is neither MS nor Apple. The key
component of all three kinds of products is a digital audio interface, and
in fact some of digital audio interfaces can be interchanged between the
three types of products.

That all said, good digital audio interfaces have vastly more dynamic range
than analog tape. The best ones have vastly more dynamic range than anybody
is likely to ever need. The problem then becomes what profitable thing to do
with all this dynamic range, and the answer is headroom. Given that any of
the good ones figuratively have dynamic range to burn, the best way to burn
it is to record at more conservatively low levels, and leave lots of
headroom in case the musos get frisky, etc.

Anyhoo, moot AFAIAC, as I can not get a recording from my vinyl setup
without having the slider set at the absolute minimum or I get
clipping, as anyone who has bothered to listen to any of the wacky
clips I post from time to time**, will tell.


As I recall, you're using a consumer sound card. If you got your hands on
one that was designed for audio production, you might find things a little
different. Consumer audio interfaces clip someplace around 1 volt. Audio
interfaces designed for the audio production environment clip someplace
between 1.7 and 8 volts.

So I'm plotting to
construct a little attenuator which I envisage as not much more than
an Alps pot in a little box with phono sockets IN and OUT, wired
accordingly.


Go for it. However, bear in mind that some consumer sound cards really need
to be operating just below clipping to deliver adequate dynamic range.



  #3 (permalink)  
Old July 29th 04, 05:07 PM posted to uk.rec.audio
Keith G
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Posts: 7,388
Default Recording Signal attenuation questions


"Arny Krueger" wrote in message
...
"Keith G" wrote in message


Guilty about the ludicrous number of gardening mags she consumes, Swim
bought me a couple of hifi comix yesterday (I'm actually so 'off
them', these days!) and in one of them I saw a mention that
attenuation of signals for computer recording purposes should be done
'pre-computer' because the software 'volume sliders' wreck the sound
quality.....???


Oh, boy.

Anyone care to confirm or deny this and would this mean it is best to
leave the sliders 'maxxed out' if one is attenuating 'pre computer'?


Keith I know you didn't say this,



It's in the August 2004 editions of either HFW or HFN - I haven't been able
to find it again yet. But there is a huge article in HFW (pp 76 - 81) that
opens up a whole new can of worms for me on the subject of LP HD. See this
strapline for an idea.....

http://www.apah69.dsl.pipex.com/keit...w/L1040425.JPG

.....so I've got a lot of catching up to do. (The extra resolution and
bandwidth of 24/96 sounds appealing and I think I'm about to revise my
thinking as a result of this bit of propaganda.....!!!)


snipped but studied - 'frisky musos'??? :-)

As I recall, you're using a consumer sound card. If you got your hands on
one that was designed for audio production, you might find things a little
different. Consumer audio interfaces clip someplace around 1 volt. Audio
interfaces designed for the audio production environment clip someplace
between 1.7 and 8 volts.



Actually I'm using only the computer's motherboard sound atm. I'm trusting
that the 'digital bits' are not being dinged up too much in the (possibly
naive and receding) idea that 'a bit is a bit'.....

My use of digital audio has changed somewhat lately - having assembled a
decent little 'computer audio' (ss amp and speakers) for 'background music',
I no longer play music straight from the hard disk and therefore ditched the
cheapo soundacard which was OK to get a digital signal to an outboard DAC,
but played merry hell with any attempts to record vinyl to HD.

As an example, I have uploaded this track.....

http://www.apah69.dsl.pipex.com/keit...ould%20Fly.mp3

....(actually a CD rip, selected only for its modest filesize) of the sort of
thing which sounds perfectly OK from the computer setup but, even though it
is only a 128MP3 (I'm recording at better bitrates these days) it sounds
really quite fine when burned to CDR/RW as an audio CD and played over my
audio setup proper.



So I'm plotting to
construct a little attenuator which I envisage as not much more than
an Alps pot in a little box with phono sockets IN and OUT, wired
accordingly.


Go for it. However, bear in mind that some consumer sound cards really

need
to be operating just below clipping to deliver adequate dynamic range.



My instinct would actually be to pull back from 'max' a tad, I have to
say......



  #4 (permalink)  
Old July 29th 04, 05:45 PM posted to uk.rec.audio
Don Pearce
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Posts: 1,412
Default Recording Signal attenuation questions

On Thu, 29 Jul 2004 18:07:31 +0100, "Keith G"
wrote:

As an example, I have uploaded this track.....

http://www.apah69.dsl.pipex.com/keit...ould%20Fly.mp3

...(actually a CD rip, selected only for its modest filesize) of the sort of
thing which sounds perfectly OK from the computer setup but, even though it
is only a 128MP3 (I'm recording at better bitrates these days) it sounds
really quite fine when burned to CDR/RW as an audio CD and played over my
audio setup proper.


I think the reason this track sounds so nice is that her voice has
been recorded straight, with no autotune turning it into a vocoder. I
suspect that this is the big difference you hear between vinyl and CD
generally - most vinyl predates that kind of messing.

It really is quite nice to hear somebody singing naturally with the
odd out-of-tune note here and there.

Who is it, BTW? - shades of Suzanne Vega there...

d

Pearce Consulting
http://www.pearce.uk.com
  #5 (permalink)  
Old July 29th 04, 06:32 PM posted to uk.rec.audio
Keith G
external usenet poster
 
Posts: 7,388
Default Recording Signal attenuation questions


"Don Pearce" wrote in message
...
On Thu, 29 Jul 2004 18:07:31 +0100, "Keith G"
wrote:

As an example, I have uploaded this track.....

http://www.apah69.dsl.pipex.com/keit...ould%20Fly.mp3

...(actually a CD rip, selected only for its modest filesize) of the sort

of
thing which sounds perfectly OK from the computer setup but, even though

it
is only a 128MP3 (I'm recording at better bitrates these days) it sounds
really quite fine when burned to CDR/RW as an audio CD and played over my
audio setup proper.


I think the reason this track sounds so nice is that her voice has
been recorded straight, with no autotune turning it into a vocoder. I
suspect that this is the big difference you hear between vinyl and CD
generally - most vinyl predates that kind of messing.

It really is quite nice to hear somebody singing naturally with the
odd out-of-tune note here and there.



That's probably because AFAIK she's not a singer as such - I think she's an
actress and/or model....???


Who is it, BTW?


Regina Lund - another in a long line of the 'Scandinavian Totty' that I'm
into (I wish.... :-) atm:

http://www.apah69.dsl.pipex.com/keit...w/fackoff.jpeg


- shades of Suzanne Vega there...


Funny you should say that - many such references in the review on this
excellent site (look under year 2000 near the bottom):

http://www.geocities.com/SunsetStrip...3/archives.htm


The album is 'Year Zero' and is excellent, if not a little 'sameyish',
throughout - nice 'presence', nice backing - not too much, just right IMO.

That track was not the best by far, if you liked that, you'll like this
better:

http://www.apah69.dsl.pipex.com/keit...ing%20Room.mp3

(Only ****e 128MP3s I'm afarid, I'll be re-ripping this at 192 or 256
sometime soon...)

And if both the tracks are dowloadable, then perhaps Pipex have stopped
truncating my webspace at 25 Mb and I'm getting the 50 Meg I'm paying
for....!!!!



  #6 (permalink)  
Old July 29th 04, 06:58 PM posted to uk.rec.audio
Don Pearce
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Posts: 1,412
Default Recording Signal attenuation questions

On Thu, 29 Jul 2004 19:32:23 +0100, "Keith G"
wrote:


That track was not the best by far, if you liked that, you'll like this
better:

http://www.apah69.dsl.pipex.com/keit...ing%20Room.mp3

(Only ****e 128MP3s I'm afarid, I'll be re-ripping this at 192 or 256
sometime soon...)


Whoa! That happy little ditty is definitely a keeper. I'm going
searching down the record shops in Soho tomorrow.

She has that Scandinavian thing of not knowing when an "s" should
sound like a "z". The Abba girls did it too. Their ignorance of the
finer nuances of spoken English is quite disgraceful ;-)

d
Pearce Consulting
http://www.pearce.uk.com
  #7 (permalink)  
Old July 29th 04, 06:56 PM posted to uk.rec.audio
Keith G
external usenet poster
 
Posts: 7,388
Default Recording Signal attenuation questions


"Don Pearce" wrote in message
...
On Thu, 29 Jul 2004 18:07:31 +0100, "Keith G"
wrote:

As an example, I have uploaded this track.....

http://www.apah69.dsl.pipex.com/keit...ould%20Fly.mp3

...(actually a CD rip, selected only for its modest filesize) of the sort

of
thing which sounds perfectly OK from the computer setup but, even though

it
is only a 128MP3 (I'm recording at better bitrates these days) it sounds
really quite fine when burned to CDR/RW as an audio CD and played over my
audio setup proper.


I think the reason this track sounds so nice is that her voice has
been recorded straight, with no autotune turning it into a vocoder. I
suspect that this is the big difference you hear between vinyl and CD
generally - most vinyl predates that kind of messing.



Meant to say that you could be right here also - I find this album *very*
vinyl-like indeed.

It has that sense of 'real' and 'immediate' that I expect (and get) from
vinyl and also why I tend to prefer a CDR made from an LP to the 'straight
CD' equivalent....

(OK, there's mastering differences too and I've got plenty of vinyl where a
vocoder has been used.....)

;-)




  #8 (permalink)  
Old July 29th 04, 10:21 PM posted to uk.rec.audio
Arny Krueger
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Posts: 3,850
Default Recording Signal attenuation questions

"Keith G" wrote in message

"Arny Krueger" wrote in message
...



It's in the August 2004 editions of either HFW or HFN - I haven't
been able to find it again yet. But there is a huge article in HFW
(pp 76 - 81) that opens up a whole new can of worms for me on the
subject of LP HD. See this strapline for an idea.....

http://www.apah69.dsl.pipex.com/keit...w/L1040425.JPG

....so I've got a lot of catching up to do. (The extra resolution and
bandwidth of 24/96 sounds appealing and I think I'm about to revise my
thinking as a result of this bit of propaganda.....!!!)


As you say, propaganda. It's sheerest BS. If he couldn't see what was
playing...


  #9 (permalink)  
Old July 30th 04, 05:42 AM posted to uk.rec.audio
Seroxat Mad
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Posts: 6
Default Recording Signal attenuation questions

hi all

what systems i.e separates u guys using?

"Arny Krueger" wrote in message
...
"Keith G" wrote in message

"Arny Krueger" wrote in message
...



It's in the August 2004 editions of either HFW or HFN - I haven't
been able to find it again yet. But there is a huge article in HFW
(pp 76 - 81) that opens up a whole new can of worms for me on the
subject of LP HD. See this strapline for an idea.....

http://www.apah69.dsl.pipex.com/keit...w/L1040425.JPG

....so I've got a lot of catching up to do. (The extra resolution and
bandwidth of 24/96 sounds appealing and I think I'm about to revise my
thinking as a result of this bit of propaganda.....!!!)


As you say, propaganda. It's sheerest BS. If he couldn't see what was
playing...




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  #10 (permalink)  
Old July 31st 04, 04:16 PM posted to uk.rec.audio
Mike Coatham
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Posts: 92
Default Recording Signal attenuation questions


"Seroxat Mad" wrote in message
...
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DO NOT STORE MY E-MAIL ADDRESS IF YOU DO
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Version: 6.0.729 / Virus Database: 484 - Release Date: 27/07/2004


And the latest release is .............................486 !!!!
It becomes a bit of a joke when you can't follow your own advice. Reminds me
of the saying....."People in glasshouses shouldn't throw stones"


 




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