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Thursday, January 27, 2011

[SurroundSound] Re: Playing 5.1 in a 4.0 setup

I understand your point about the amps and agree. I happen to have a
Denon with 6 discrete amp sections, so I have no need of any sub
(stitute for decent sized woofers) :-}}

On Jan 28, 1:55 am, ceplas...@aol.com wrote:
>   If you aren't concerned with having blu-ray compatability, you might want to consider looking on Craigslist for an older surround receiver with multi-channel outs from the pre-amp stage.   If you have a basic surround receiver, speaker setup is a snap, and it seems like with all the blu-ray and hdmi stuff coming in, you can find really solid older receivers for pretty short money.  If you get one with the pre-amp outputs accessible, you can use the built in amp stage, or skip it and feed it into your quad setup if you have a 4 channel amp you prefer.
> I have a couple of decent surround receivers, and while neither of them are compatible with hdmi or any of the hd-audio formats, I really don't miss it (yet).   They do have inputs for my dvd-audio player and a few digital inputs, so I feel like I am pretty much covered.    In addition to the dvd-audio thing,  I also have an older pc hooked up to the a receiver with an rca-spdif cable so that I can play back dts-cd quad files without having to get a multichannel soundcard or having to settle for pc sub/sat speaker systems.
>
>    As far as realafrica's response pertaining to using 5 full range speakers, totally a legit way to go.  However,  one thing you want to keep in mind is that most manufacturers of surround receivers are expecting you to use a powered sub, and unless you shell out big bucks for an amp with a killer power stage (like 5 separate discrete channels), you will lose a significant amount of volume and headroom because the receivers amp is using power to reproduce bass frequencies.  Even though I have full range speakers in my system, I still set the speakers to small and use the powered sub, as the whole thing runs a lot better that way.     The trend nowadays with surround receivers is that the video features are more important than the power stage, so be careful.      - CP
>
> -----Original Message-----
> From: realafrica <paul.gam...@gmail.com>
> To: SurroundSound <surroundsound@googlegroups.com>
> Sent: Thu, Jan 27, 2011 9:54 am
> Subject: [SurroundSound] Re: Playing 5.1 in a 4.0 setup
>
> On a tangent to this... my main system was quad with 4 full size cabs,
> but then I bought a centre speaker and just turned off LFE in the
> Denon receiver's settings, so all bass goes to the 12" woofers in my
> cabs and I don't use the .1 in any kind of 'sub woofer' at all. To my
> way of thinking the 'sub' stands for substitute for having proper 12"
> woofers in the first place :-}}
> Therefore I guess you could say I run a 5.0 system rather than a quad
> nowadays.
>
> On Jan 27, 6:00 pm, Stephen Disney <sthunderroc...@gmail.com> wrote:
> > I don't know about your soundcard, but most creative cards give 4.0 as
> > an option in speaker setups.  Also, while I don't know how well it
> > works, VLC give the option to output 2front/2rear on all 5.1 audio.
> > S
>
> > On 1/27/11, Peter Cawthron <peter_cawth...@yahoo.co.uk> wrote:
>
> > > Hi Alejandro,
>
> > > I do the same as you - nearly all my quad listening is from a PC into a
> > > Sansui QRX-9001 receiver.
>
> > > Most of the time I use foobar with the Matrix Mixer add-in. For 5.1 material
> > > I usually send 0.5 of the C to both LF and RF, and I send 0.25 of LFE to
> > > each of LF, RF, LR, RR.
>
> > > When you ask about an 'automatic' method you could use a DirectShow filter
> > > like AC3Filter or ffdshow - although I lost track of what players these work
> > > with - but all that means is that someone else has chosen the default
> > > matrix. In AC3Filter the default for its '2/2 - quadro' output is:
>
> > > LF comprises L=0.4531 + C=0.3204 + LFE=0.2265
>
> > > RF comprises R=0.4531 + C=0.3204 + LFE=0.2265
>
> > > LR comprises LR=0.4531 + LFE=0.2265
>
> > > RR comprises RR=0.4531 + LFE=0.2265
>
> > > You can change the default values in AC3Filter. Something very similar is
> > > done in ffdshow with a customisable matrix.
>
> > > Regards,
>
> > > Peter
>
> > > From: surroundsound@googlegroups.com [mailto:surroundsound@googlegroups.com]
> > > On Behalf Of Alejandro Valdez
> > > Sent: 27 January 2011 3:47 PM
> > > To: surroundsound@googlegroups.com
> > > Subject: [SurroundSound] Playing 5.1 in a 4.0 setup
>
> > > Hi group, I've a homemade 4.0 quad setup (cheap, but does the job) connected
> > > to a PC to play my files (DVD-A, FLAC, anything...).
>
> > > When listening to 5.1 mixes I found that I'm loosing an important part of
> > > the audio track, sometimes the voice goes in the center channel of the 5.1
> > > mix and is missing in the front channels.
>
> > > I discovered that using a matrix mixer (a kind of DSP in your media player
> > > of choice) I can redirect any amount of the center channel to the front
> > > channels, that works but:
>
> > > 1) I don't know if I'm getting the right mix (how much of the center and sub
> > > channels should I send to the front channels?)
>
> > > 2) I would like a player that can convert on-the-fly the 5.1 tracks to a 4.0
> > > output without any changes in the configuration (I mean automatically).
>
> > > I guess that I'm not the only one in this situation, so how do you solve
> > > this kind of issues?... any player/plugin suggestions?
>
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