Alesis ANDROMEDA A6 Tips And Tricks

• Press the Filter CV Input button.
• There is another shared path here; analog Noise modulation of Filter Frequency/External Audio
In is disabled to allow this DC signal's use.
• Note that Aud Ext In is automatically selected in the Pre Filter Mixer.
• The Pre Filter Mixer's Noise/External Level control is used to set the amount of this signal to the
Filter(s).
• This is a single path and it can be Enabled and Disabled per Filter by pressing Filter View: and
using soft pot 8 to select EXT IN in the CV SOURCE parameter.
Mike Peake wrote:
There are a pair of CV ins, one for the oscillator functions and one for modulating filter frequencies.
The oscillator functions include exponential frequency, linear frequency, pulse width, and IIRC
modulation of the FM path's levels. These routes and amounts are programmable per program, but
the single CV in will effect all voices simultaneously. Due to the extremely sensitive pitch response
of the unit (significantly more so than 1V/8Va), each voice has a slightly different depth so if you
want to control the oscillators from an analog sequencer, it's best to do it in mono mode so you can
scale the response to a musical range. Otherwise, these inputs are perfect for very large changes to
the assigned parameter(s) and can easily modulate filter Fc and oscillator frequency across their
entire ranges from an input value of IIRC 0-5VDC.
NOTE THAT THESE ARE SHARED INPUTS:
Mike Peake wrote:
I noticed that turning the filter CV input "on" automatically turns the External1-16 audio input "off"; I
assume that: A) this is the reason, and B) if the filter CV input is used for voices 15 or 16, the
individual External15 or External16 inputs (respectively) will be disabled? Or is the filter CV input
never available for voices 15 & 16?
The Ext Audio Input, the analog Noise, and the Filter CV Input are all run through the same VCA for
attenuation and only one of each can be used at a time as a result.
The Filter CV will control all voices in a Program simultaneously. The External Audio signals are
routed as specified on each Ext In button.
Mike, Your tutorial on getting the Osc CV in to work made my life much better. Thanks
again. Question #2 (& maybe 3) --I want to control the A6 from my theremin (thru the
SPV355). It seems that I have to have a note depressed on the keyboard and then the CV in
changes that pitch. Is there any way to not have a note depressed that it always goes back to
when the CV in stops modulating it (so it goes silent)? Question # 3 would be: Is there any
way to get the A6 to respond to the volume via CV? (This would be great for theremin.)
Thanks,
Rob Schwimmer
22.21 cv inputs must be triggered by another method
Mike Peake wrote:
Hi Rob.
The A6 was designed in a way that you must press a note in order to actually fire a voice, which you
can then modulate. The CV inputs are only routed in hardware to control oscillator and filter
parameters.
Check the manual to see if the Pedal input is CV or resistance; if it's CV, you can send the control
signal of the theremin's volume to it and set a sound to have Pedal modulate Envelope 3 Level. I
believe that you have to set Envelope 3's level to 000.0 on the Level page for this to work. (I haven't
done it before!)

Alesis ANDROMEDA A6 Specifications

General

Brand	Alesis
Model	ANDROMEDA A6
Category	Synthesizer
Language	English