I have a device which produces synth-tones in line-level (unamplified)
mono, but would like convert the signal to pseudo stereo.
I would need a simple box with one input and L/R outputs, and maybe a
few controls. Anything device like that in the market? Looking for
something cheap, quick, and dirty.

Thank you.
Marcel

(Marcel Gonzalez) wrote in
om:

I have a device which produces synth-tones in line-level (unamplified)
mono, but would like convert the signal to pseudo stereo.
I would need a simple box with one input and L/R outputs, and maybe a
few controls. Anything device like that in the market? Looking for
something cheap, quick, and dirty.

Thank you.
Marcel


Boss chorus pedal?

Orban stereo synthesizer?


---------------------------------------
"I know enough to know I don't know enough"

Marcel Gonzalez wrote:

I have a device which produces synth-tones in line-level (unamplified)
mono, but would like convert the signal to pseudo stereo.
I would need a simple box with one input and L/R outputs, and maybe a
few controls. Anything device like that in the market? Looking for
something cheap, quick, and dirty.

Interesting, it's an area I've been looking into myself. It's tricky with
a purely mono source. See if SRS labs have links to anything suitable on
their site.

http://www.srslabs.com/


Graham

Marcel Gonzalez wrote:
I have a device which produces synth-tones in line-level (unamplified)
mono, but would like convert the signal to pseudo stereo.
I would need a simple box with one input and L/R outputs, and maybe a
few controls. Anything device like that in the market? Looking for
something cheap, quick, and dirty.

Orban made a fake stereo box in the eighties that worked surprisingly
well, and had goo mono compatibility. They turn up used for cheap.
--scdott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Scott Dorsey wrote:

Marcel Gonzalez wrote:
I have a device which produces synth-tones in line-level (unamplified)
mono, but would like convert the signal to pseudo stereo.
I would need a simple box with one input and L/R outputs, and maybe a
few controls. Anything device like that in the market? Looking for
something cheap, quick, and dirty.

Orban made a fake stereo box in the eighties that worked surprisingly
well, and had goo mono compatibility. They turn up used for cheap.
--scott

In fact, we've got two here we never use. Probably could stand to get
rid of one. We have an Orban 245E and a 245F. They're completely mono
compatible because the "stereoification" is added to the left channel
while being subtracted from the right channel. Sum them, and all the
faux stereo cancels, leaving you with theoretically exactly what you
put it in. It works pretty well. It colors the sound, but it's
adjustable enough so you can find a coloration you like. I tried it on
acoustic guitar once and it messed up any realism in the track, but
it's fine to great on electric guitars, synths, and any other
"synthetic" sources that are either unharmed or improved by comb
filtering effects.

If anybody wants one of these guys, shoot me an e-mail to an
intelligently edited edition of my reply-to address.

ulysses

I thought anti-phase effects are exactly what is NOT mono-compatible,
the idea being the "stereoification" on one instrument in a mix makes
that instrument louder during stereo playback but quieter during mono
playback, relative to "non-stereoified" instruments/voices.

There is currently no simple way to isolate a single instrument in a mono mix
and selectively enhance or suppress it (though I wouldn't be surprised if this
eventually becomes possible).

There are many ways to produce pseudo stereo. One is to delay and/or phase-shift
and/or frequency contour the mono signal.The idea is to create a "difference"
signal that has some of the properties of the difference between L and R in a
"real" stereo signal.

Let's call the original mono signal M and its processed version P. Adding them
(M+P) produces one channel (usually the left, but it makes no difference), while
subtracting them (M-P) produces the other channel.

Assuming you were awake during algebra, adding them produces 2M, subtracting
them produces 2P, making this sort of processing 100% mono-compatible.

The main effect of phase shifting or delay is to chop holes in the M+P and M-P
frequency response. This comb filtering (or "901 effect," if you want to be
nasty about it) adds spaciousness to the sound, and sometimes causes particular
instruments to move left or right of center.