Alesis Andromeda A6

It's a strange thing - it's almost as if there were a log pot where the A6
expects linear response.  I'd say that the pedal almost definitely has a log
pot, since it also functions as a volume pedal.

 

--Chuck

 

  _____  

From: Andromeda_A6-ION@yahoogroups.com
[mailto:Andromeda_A6-ION@yahoogroups.com] On Behalf Of Leo &Lydia
Sent: Friday, November 30, 2007 2:11 PM
To: Andromeda_A6-ION@yahoogroups.com
Subject: Re: [Andromeda_A6-ION] Digest Number 470

 

i wondered if a resistor parallel to the trimming pot with a lower value
would do the trick. otherwise it seems a new pot is the only other choice,
or isn't it ? 

On Nov 30, 2007, at 4:07 PM, charles graef wrote:

Don't forget that the voltage, and the resistance and lin./log.-ness of the
pot won't be influenced by the type of plug, and it's these things that
aren't within a useful calibration.



 



The problem with the pedal is that insofar as the A6 is concerned all the
voltage attenuation action is concentrated into one end of the range of the
pedal movement.  I believe it would work fine with a different pot.



 



--Chuck



 




From: Andromeda_A6-ION@yahoogroups.com
[mailto:Andromeda_A6-ION@yahoogroups.com] On Behalf Of Eduardo Saponara


Sent: Friday, November 30, 2007 9:08 AM


To: andromeda_a6-ion@yahoogroups.com


Subject: RE: [Andromeda_A6-ION] Digest Number 470



 

Hi Charles,


 


Well, the Andromeda Manual states that the EXP input is expecting a mono
plug, (see for yourself, I'd be curious to know if this was an error) and
then TRS exp. pedals don't seem to work.  I understand the voltage divider
process by which the TRS pedals work, but this can be accomplished with 2
conductors as well, using the ground and tip as the wiper and ground of a
pot, for instance.  Are you using a trs exp. pedal successfully?  Maybe the
F2 has a way of telling what the synth expects?  Mine doesn't work unless
the insert cable is used taking the ring connection out.


 


I also tried inverting the response of the pedal and still got no joy with
the TRS connector Exp. Pedals.  Can you confirm that you are using an exp.
pedal with trs connectors?


 


I'll try a trs cable with my FV-500 and see if I can get it to work.


 


So the F2 uses the same jacks for volume pedal and exp. pedal functions?


 


Russ:


 


The moog pedal seems to have an integrated cable, and since it seems to be a
CV pedal there is a chance it provides the voltage, being designed for use
with moogerfoogers.  be sure before you order, an extra $15 isn't too much
for the right thing.


 


BTW, I have a friend looking for an Andromeda in the NYC area with no tuning
issues and in good shape, if anyone knows of one please forward the info to
me.


 


Eduardo



 


-----------------------------------------------------



Posted by: "charles graef" vogelscheiss@...   modularcharles

Thu Nov 29, 2007 8:12 am (PST)

The A6 expression pedal jack is TRS, as is the F2 input. The voltage being


attenuated through the pot in the F2 comes from the A6 and returns to it via


the same plug.



The selector switch on the F2 is for choosing its operational mode, either


using a TRS cable, as you would with the A6 expression jack, or as a volume


pedal inline between the output of something and an amp. 



There's no such thing as a mono exp. pedal input, per se. You'd need to


have a voltage source. You can use an expression pedal in a modular by, for


instance, taking a voltage source like the Doepfer A176 and running it


through the pedal in volume pedal mode and into a CV in elsewhere on the


modular.



FWIW the scaling of the F2 works fine with my CME UF8 MIDI controller


keyboard. Why Alesis doesn't subscribe the A6 to the same standards that


other expression inputs use is an open question.



--Chuck



 




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