Hi,
I found a very helpful document at the Squarewave forum, named Voyager Control Inputs.pdf (http://launch.groups.yahoo.com/group/Squarewave/files/*%20Voyager%20Reference%20Pages%20*/).
But, when I supply a positive voltage to the PAN input (tip) then the output level of the left (!) output increases (negative → right output).
As it’s described contrary in the above mentioned document, I’d ask if anybody could test this behaviour on its own MMV.
Thank you in advance
Hi Frank,
I verified your results on my Voyager. You are indeed correct. Checking the Voyager User’s Manual, I think I found the source of the error. In the section titled “Main Output” it says:
“PAN INPUT: A -2.5 to 2.5 V control voltage applied to this jack will cause the output signal to pan from left to right.”
Taking the sentence literally, one would expect that a -2.5V CV would pan fully LEFT, while a +2.5V CV would pan fully RIGHT. This is the opposite of what you and I observed. Giving the Moog folks the benefit of the doubt, what they probably intended to say was that the Pan Input has an effective range from -2.5 to +2.5V, which will cause the Voyager to pan fully across the outputs. (I’d also add that the Pan CV range is unique - all other Voyager CV ranges are either 0 - 5V or -5 to +5V)
Thanks for pointing this out. Glad to hear that you found the document helpful!
Greg
Addendum: Document fixed and reposted on SquareWave - GK
Hi Greg,
thanks a lot for answering so fast…
Glad to hear that you found the document helpful!
No, Greg, it’s not only this document I found very helpful! It’s your whole work at SquareWave…
Thank you again!
(excuse the reuse of that old thread, but it’s a similarly problem…)
Hi GregAE,
now I found that the voltage range of the PAN INPUT isn’t only -2.5 to 2.5V, but it’s the “full” range (-5 to 5V).
I used the FOUR-INPUT MIXER (CP-251) as a simple voltage source, nothing connected to its inputs, MASTER pot at “10” and the OFFSET pot as the voltage controller. I connected the “+ OUT” to the PAN INPUT of the MMV.
I measured the voltage of that “+ OUT” to be sure that it delivers this full range (-5 to 5V) when turning the OFFSET knob from -5 to +5.
When doing so you get one hand free for playing while using the other hand for turning that OFFSET knob. As the result you can hear moving the PAN of the MMV from left (+5) to right (-5), and there is no limit at +2.5 or -2.5.
Could you please confirm this behaviour at your MMV?
Should I’ve done any mistake? If not, my next question is: Why does MoogMusic describe the PAN INPUT to be different from the other inputs? Any idea?
Thank you in advance!
Zero volts is center pan, right? With nothing plugged into the rear panel PAN jack, it is much easier to normal it to ground (zero volts) and have normal center pan operation.
Hi MC,
thank you for your reply.
“different” was meant in relation to the voltage range, not regarding the bipolar signal.
All the other bipolar output signals are using a range of -5 to +5V, but the PAN INPUT was specified to be -2.5 to +2.5V. And if this would be true (the smaller range) then I think it’s not a “good idea” to shorten only that PAN INPUT range, isn’t it? All control outputs deliver a wider range of voltage.
OK, I cancel my question “Why does MoogMusic describe…”
… but again I would ask you to test if your MMV’s react the same way in relation to the PAN INPUT voltage.
Hi,
could anybody please test the necessarily voltage range for the PAN INPUT,
is it -5 to +5V at your MMV too (… to pan from complete right to complete left…)
or is it “only” -2.5 to 2.5V (as described in the manual e.g.)?
Thank you in advance.
Hi Greg,
even though there is no answer until now (… maybe nobody is measuring the MMV voltages as I did…)
I’m still interested in clarifying if the voltage range of the PAN INPUT
It was described to be an exception (that smaller range in comparison to many other control inputs) but by now I can’t believe it…
Could you please clarify if it’s a “malfunction” of my MMV or if this is the normal feature of all MMVs?
Thank you in advance!
Hi Frank,
Haven’t been ignoring you, I’ve just been mired in a few projects lately.
My Voyager isn’t connected to my CV rig at present, so I can’t check the voltages (the VX-351 is part of the CV rig, and my Voyager is at another location).
I’d guess that you can reasonably exceed the Pan input voltage without harm, so applying +/- 5V shouldn’t cause problems even though the spec is +/- 2.5V.
Hi Greg,
thank you for your reply and excuse my impatience, please…
I’m sure that a higher voltage wouldn’t destroy my MMV, but this wasn’t the question 
I observed, that I couldn’t get e.g. the full left PAN position if only +2.5V are applied. That needs +5V 
So I think there is any mistake, either my MMV doesn’t work quite well or the spec isn’t quite correct…
I asked at moogmusic, but until now no answer. Therefor I don’t give up the hope that anyone could approve either of the two possibilities (defect or incorrect spec).
Maybe it’s not so important but I’d like to clarify this point…
Thank you!
… did anybody check the necessary voltage range of the PAN INPUT
(… to achieve full right/left panorama)
… -2.5 to +2.5V or -5 to +5V?
Hi Frank!
Haven’t forgotten you, but my Voyager is still in a different place from the rest of my gear and I have no way of testing the Voyager’s Panorama CV.
I am curious to know how you are testing this - is it simply a matter of critical listening, or are you taking measurements of the left and right outputs?
Greg
Hi Greg,
Haven’t forgotten you…
thank you for answering, and excuse my “pushing”, please.
… how you are testing this…
if one uses a headphone, one can hear that after applying 2.5V (plus or minus) to the PAN INPUT and then slowly increasing the voltage to 5V (plus or minus) the panorama is moving more and more
if one uses a mixer (with a meter bridge) one can observe that the levels (left and right) are the more different the more the voltage comes to 5V (plus or minus)
At least my MMV got this behaviour…