[Jukebox-list] Audio question

[Ron Rich]

I gues that's why I never "adjust" them( as well as "tone switches")--I just tend to leave them all the way "on", as all I can detect is less volume----Ron Rich

Wesley Dean <wesleydean at cox.net> wrote:  One useful purpose of EQ's is the use of 'T' notch filters to eliminate 
acoustical feedback in auditoriums. They are also good in tailoring sound 
for defective ears on a personal level. I once had a friend that had to roll 
off the low end at 500 hz. Wes
----- Original Message ----- 
From: "Ron Rich" 
To: "Jukebox mailing list" 
Sent: Tuesday, July 24, 2007 11:42 AM
Subject: Re: [Jukebox-list] Audio question


This brings up anudder question that no one has answered to my 
satisfaction--yet.
What EXACTLY, is the advantage to an "equalizer"--as far as I'm concerned, 
it's just (more) "tone controls" ?? (and most of the time more difficult to 
adjust so that it sounds right to me)
Ron Rich

Don wrote:
While we are on the subject, I guess it might be coincidental that a 
friend
sent me this very interesting link showing iPods and vacuum tube amps.
Clearly someone figures they can make a buck at this marriage of old and new
tech. Enjoy the giggle:

http://www.vuumaudio.com/

Kindest Regards,
Don



----- Original Message ----- 
From: "Jay Hennigan"
To: "Jukebox mailing list"
Sent: Monday, July 23, 2007 12:12 PM
Subject: Re: [Jukebox-list] Audio question


> David Breneman wrote:
>> --- Ray Finch wrote:
>>
>>
>>> There was some mention before of digitally reproduced sound not
>>> being as good because it is sampled and that the tube amps have a "warm"
>>> sound to them. I have heard these arguments before...
>>
>>> The "warm" sound of a tube amp is not anything that I have ever
>>> been able to notice.
>>
>>
>> The so called "warm" or (gag!) "phat" sound of tube amps
>> primarily expresses itself in distortion. When overdriven,
>> tube amps tend to distort br producing harmonics. Transistor
>> amps tend to distort by clipping. If you never drive your
>> amp to distortion there is very little difference in the
>> sound. As far as sampling goes, the notion that analogue
>> media have "limitless" frequency response is pur snake oil.
>> CDs top out at 20 kHz, which most people over 20 can't
>> hear. My hearing tops out at about 18+ kHz, and 15 kHz
>> isn't uncommon. Most LP albums contain nothing above
>> about 17-18 kHz.
>
> Two different discussions here. Tube vs. solid-state analog amplifiers
> and analog vs. digital recording and reproduction.
>
> Clipping is a form of distortion as well. Clipping tends to result in
> odd-order harmonics. Push-pull tube amps and some transformer-coupled
> solid state amps exhibit even-order harmonics when overdriven, which are
> generally less harsh-sounding than odd-order harmonics.
>
> Uncompressed digital sound reproduction, given a high enough sampling rate
> and sufficient bits per sample, is going to be as good as analog
> reproduction. CDs approach this very well. Most studio recording and
> mixing is now digital, even if the end medium is a vinyl record.
>
> Typical MP3 files give up a lot of the music as a tradeoff for file size,
> and will be degraded. Someone listening to an IPod through $2 earbuds
> while jogging on a busy street isn't going to notice it, but critical
> listening to a decent system will show it. Sibilants in vocals, cymbals,
> etc. are noisier and you can hear an aliasing or flanging on some notes.
>
> A Sheffield Lab direct disk pressing on a good system in a decent
> listening room will literally give you chills. Occasionally but rarely a
> good CD will do the same.
>
> --
> Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net
> Impulse Internet Service - http://www.impulse.net/
> Your local telephone and internet company - 805 884-6323 - WB6RDV
> _______________________________________________
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