Dear Asa,

Yea, wegner makes some good AESEBU monitors. Several things about AESEBU...

Cool
 - Stereo over one pair
 - Single XLR connector is compliant standard
 - Lossless quality.

Uncool
 - Expensive
 - Try separating left and right
 - No Cat 5 specification.  I submitted one....

Whitebox is pretty simple. BTW AESEBU is balanced in the analog interface specification.

Regards,

Flint

On Fri, 19 Jun 2009, [email protected] wrote:

Date: Fri, 19 Jun 2009 14:03:51 -0400
From: "[email protected]" <[email protected]>
Reply-To: Vermont Area Group of Unix Enthusiasts <[email protected]>
To: [email protected]
Subject: Re: PCI FM Transmitter vs White Box Audio...

Cool! At my desk at VPR, I get audio over CAT5 as well - but it's digital. I
have a pair of edirol monitors with SPDIF inputs. Since it's a fairly short
run, it's not balanced (since it's digital, the quality isn't affected). I
suppose you could also run balanced AES/EBU audio through a house over CAT5,
but converting the AES/EBU to consumer digital is quite expensive.

Asa

On Fri, Jun 19, 2009 at 1:34 PM, Paul Flint <[email protected]> wrote:

Greetings Lurkers,

I actually send audio from my central audio server, normally getting an IP
stream to about a dozen stereos and old computer speaker sets throughout the
house.  The secret?  I use RJ-45 cabling...  Here is the deal:

Pin     RJ 45 Standard
1       10baset Transmit +
2       10baset Transmit -
3       10baset Receive +
4
5
6       10baset Receive +
7
8

Pin     White box audio
1       Right In +
2       Right In -
3       Right Out +
4       Left Out +
5       Left Out -
6       Right Out -
7       Left In + 8       Left In -

Each listening station can also transmit.  Each station consists of at
least two white boxes, one of which fronts to the RJ-14 and contains
isolation transformers to allow the audio signal to remain balanced.
(see http://en.wikipedia.org/wiki/Balanced_audio BTW the telephone company
invented this about 100 years ago. :^).  The other box is an RJ-45 plug to
whatever, which is typically either two or four RCA Jacks or one or two mini
plugs...

I have a site that I have been hacking on about this subject for many
years.  I suppose I will put it up when I get back from Jobhunting in DC.

I listen to this system every day, and I like it.

Regards,

Paul Flint



Kindest Regards,



Paul Flint
(802) 479-2360


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Paul Flint
Barre Open Systems Institute
17 Averill Street
Barre, VT
05641

http://www.bosivt.org
http://www.flint.com/home
skype: flintinfotech
Work: (202) 537-0480

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Kindest Regards,



Paul Flint
(802) 479-2360


/************************************
Based upon email reliability concerns,
please send an acknowledgment in response to this note.

Paul Flint
Barre Open Systems Institute
17 Averill Street
Barre, VT
05641

http://www.bosivt.org
http://www.flint.com/home
skype: flintinfotech
Work: (202) 537-0480

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