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#344478 - 04/07/11 02:10 PM sayings-myths-falsities-truths in audio/video
J. B. Offline
connoisseur

Registered: 01/19/11
Posts: 1291
Loc: Quebec, Canada
We read and hear all the time profound "truths" about this hobby of ours, some true, some false, some so outright exaggerated that we can't stop laughing.
If you know some good ones, this is the place to expose them to the elements.
Let's have a good collection of them.

Let me start:

The volume at which you play the music is exact if, when you go to another room, you can say that the band or singer is really present and playing in that room. True? Yes.

Another one: just like trimming the length of the quarterwave elements in a dipole or yagi antenna to exactly the same lengths is of the utmost importance, specially for transmitting; the wires transmitting the signal from the amp to the speakers must be exactly the same length. True? No.
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#344479 - 04/07/11 02:13 PM Re: sayings-myths-falsities-truths in audio/video [Re: J. B.]
BobKay Offline
connoisseur

Registered: 03/23/10
Posts: 3596
Loc: Massachusetts Badlands
Axioms sound better with wood veneer cabinets.

And falsities are easy to spot on any 14 year old.


Edited by The Bob (04/07/11 02:16 PM)
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#344499 - 04/07/11 03:48 PM Re: sayings-myths-falsities-truths in audio/video [Re: BobKay]
nickbuol Offline
axiomite

Registered: 09/16/04
Posts: 5319
Loc: Marion, IA
Originally Posted By: The Bob
And falsities are easy to spot on any 14 year old.


I think that you are inserting an extra "t" when you say falsities. grin
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#344511 - 04/07/11 04:31 PM Re: sayings-myths-falsities-truths in audio/video [Re: nickbuol]
J. B. Offline
connoisseur

Registered: 01/19/11
Posts: 1291
Loc: Quebec, Canada
about the extra "t", that reminds me about a nice french canadian ability to pronounce english, as taught by publicity agencies:

"Hi ave ealty teet".
"ealty" = healthy.

any other gems like this?


Edited by J. Bellemare (04/07/11 04:33 PM)
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#344512 - 04/07/11 04:34 PM Re: sayings-myths-falsities-truths in audio/video [Re: J. B.]
BobKay Offline
connoisseur

Registered: 03/23/10
Posts: 3596
Loc: Massachusetts Badlands
As much as it would have hurt me, even I would have capped French Canadian.
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#344513 - 04/07/11 04:43 PM Re: sayings-myths-falsities-truths in audio/video [Re: BobKay]
ClubNeon Offline
connoisseur

Registered: 02/06/09
Posts: 3466
Loc: Western Maryland, USA
Any time anyone says "fallacies", I can't help but think of the movie Who's Harry Crumb.
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#344528 - 04/07/11 07:57 PM Re: sayings-myths-falsities-truths in audio/video [Re: ClubNeon]
BlueJays1 Offline
connoisseur

Registered: 09/19/08
Posts: 4116
Loc: Porch,enjoying Bombay Sapphire
I minimalist approach to crossover design (1st order) sounds best - Not necessarily.
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#344585 - 04/08/11 08:53 AM Re: sayings-myths-falsities-truths in audio/video [Re: BlueJays1]
J. B. Offline
connoisseur

Registered: 01/19/11
Posts: 1291
Loc: Quebec, Canada
Quote:"Distortion can cause problems in any speaker because the distortion components can be passed by a crossover and end up in a high frequency driver not designed to handle large amounts of power."

Answer:According to what you say, if you were to send to the prepro/amp a bad recording of a song (containing distortion), when this distorted sound would go to the speakers, the distortion contained in the recording would go to the tweeter, overload it with unduly large amounts of power, and put the tweeter in danger of overheating.

If you'd like to check if distortion damages tweeters, get this file:Thomas Edison - Great Speeches - 1887, First Gramophone Recording Ever.mp3
and play it on your system. The sound is very distorted so it should make a very good test.

I think speakers don't know and don't care if a signal is distorted or not. They just reproduce what is sent to them, no more, no less.
In fact, you can be certain that signals without any distortion don't exist.

Sending too much power to a speaker can damage it; distortion does not damage speakers, it only muddies the sound.

If you'd like to check if distortion damages tweeters, get this file:Thomas Edison - Great Speeches - 1887, First Gramophone Recording Ever.mp3
and play it on your system. The sound is very distorted so it should make a very good test.
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#344593 - 04/08/11 10:14 AM Re: sayings-myths-falsities-truths in audio/video [Re: J. B.]
Cork Offline
old hand

Registered: 03/19/10
Posts: 98
Loc: Pennsylvania, US
>> ... distortion does not damage speakers...

So are you saying that you don't belive in the common wisdom that clipping damages speakers? Or is your comment only related to distortion in the form of sonic "inaccuracies". I've bought into the clipping wisdom, so I'm curious.

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#344594 - 04/08/11 10:24 AM Re: sayings-myths-falsities-truths in audio/video [Re: Cork]
ClubNeon Offline
connoisseur

Registered: 02/06/09
Posts: 3466
Loc: Western Maryland, USA
Distortion from an amplifier pushed into clipping will damage a speaker quicker than driving it with too much clean power.

It's very difficult to record a clipped signal and have it's DC component make it all the way to the speaker.

Say someone is overdriving a guitar amp. Guitar amps are usually mic'd, the microphone can't produce a DC signal, so it won't make it to the recording.

As you move up the chain, mic pre-amp, mixing board, mastering, it does become easier for a DC signal to end up on the the disc, but then there's playback.

It's just as hard to get a DC signal out of an amp (that isn't over driven) even if it appears in the music source.

Really the only place one has to worry about dangerous distortion from clipping is when it is being generated by the amplifier connected to the speakers. In a recording you'll only hear the harmonic components of said clipping.
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Sony PS4, surround backs
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