There is another point - you can recover the B-Format horizontal information 
from UHj - so, notionally, using Bruce Wiggins' irregular decoding, you could 
display it on 5.1

Dr. Peter Lennox

School of Technology,
Faculty of Arts, Design and Technology
University of Derby, UK
e: p.len...@derby.ac.uk 
t: 01332 593155


-----Original Message-----
From: Sursound [mailto:sursound-boun...@music.vt.edu] On Behalf Of Jörn 
Nettingsmeier
Sent: 14 March 2014 10:48
To: Surround Sound discussion group
Subject: Re: [Sursound] Question about UHJ

On 03/14/2014 03:48 AM, Schumacher Marlon wrote:
> Dear list,
>
> A friend of mine was planning to encode a recording of his 
> instrumental music (appr. 20 mic feeds) into 2-channel (2D) UHJ format 
> and was strongly discouraged as UHJ would introduce nasty phasing 
> effects. Since there should be some hundred 2-channel UHJ LPs and CDs 
> (which should be stereo compatible) I wonder if this is true?
> I read about the stereo-widening effect when listened to undecoded 
> (which was sometimes purposely used asa production effect), but wasn't 
> aware of these phasing artefacts.
>
> I'd be happy about any advice/comments.

they are very obvious for sources far to the sides and in the rear, but if you 
balance them properly, the overall effect to me is very pleasing.
a mistake i once made: a jazz recording, musicians surrounding the tetramic, 
turned so that the singer is due north. the double bass ended up at 150° to the 
left, which meant it caused large amounts of negative correlation when listened 
to in UHJ, and lost quite some oomph. don't do that. if you can keep all your 
important sources between, say, +/-55°, i find UHJ to be very satisfactory, and 
in fact it makes mixing past the usual stereo boundary quite easy. but as with 
all real-life audio
solutions: expect miracles and be disappointed, use the wider soundstage subtly 
and economically, and you just added a new hue to your mixing palette.

if you know your target will always be stereo, then UHJ is a slightly 
sub-optimal solution - hand-crafted stereo will be better in corner cases, but 
that takes a lot of care. if you are targetting surround and stereo is needed 
for compatibility, then UHJ is a very reasonable 95% solution, and its sound 
may even be preferred by some (me included), but for every person who loves it 
you will find another who hates it.


--
Jörn Nettingsmeier
Lortzingstr. 11, 45128 Essen, Tel. +49 177 7937487

Meister für Veranstaltungstechnik (Bühne/Studio) Tonmeister VDT

http://stackingdwarves.net

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