On Monday 03 February 2014 08:33:25 pm Jim Stewart wrote: > >Personally, I always liked using a single channel balanced input, > >and feeding L+ and R- into to it, to obtain L+R out and let the > >>differential input do what it does ! > > Hey I do that! It doesn't always work perfectly as it depends on impedances > of the inputs and outputs a little,
Not really any more than any other load, with modern Low-Z out and high-Z in. To an extent, yes. The real caveat is that you sacrifice the noise immunity afforded by balance in the first place. Not recommended for lines longer than a few feet. Either you have what amounts to an unshielded unbalanced line, or ground loop heaven. No free lunch. > and of course only works with "electronic balanced" > outputs (two differential amp outputs, no transformer). > > Also it sure confuses people that come in behind me, > so I tend to only do in places where nobody is likely to find it! Document, document, document. And, since this is so ( surprisingly ) unknown by so many "engineers" leave a copy right at the connection. > >Date: Mon, 3 Feb 2014 15:18:15 -0800 (PST) > >For Jim's virtual approach, I would think there should be an effective > >baseline phase test one could employ. The very best is your ears listening to the mono sum output. > I've never checked it this closely (I've got an Oscilloscope on my bench I > could use, but never felt the need), but one thing for sure I've never heard > the "slipping/rolling phase" problems with JackAudio as I used to when > mono-ing stereo sources that came from old fashioned tape playback! Really > unless you want to employ a fancy "phase chaser" device or software to > continuously correct the source before summing, mixing signals with JackAudio > seems to work fine. > > > > Then again, I only do this mix-2-mono stuff for IFB feeds, and other > monitoring needs (I have "Cue" buttons on RDAirplay that gets creative with > my normal stereo studio monitor speakers - Did I ever tell you Rivendell > allowed by to build a broadcast studio without a traditional physical mixing > console? We even have one, I just never had a good reason to install it > yet!), and "low-grade" (internal use) preview streams. We can do things in software never dreamt of in your philosophy, Horatio ! :) -- Cowboy http://cowboy.cwf1.com Experience varies directly with equipment ruined. _______________________________________________ Rivendell-dev mailing list [email protected] http://caspian.paravelsystems.com/mailman/listinfo/rivendell-dev
