On 6/25/07, longforparade < longforparade@... > wrote:

> -How "hot" are the trig/gate outputs on the A-155; does it put out the +10V required to
> trig the 2600's envelopes

My A-155 outputs about 9V on the gate/trigger outs. I wouldn't be
surprised if this turns out to be enough to trigger the ARP's
envelope.


> -I would also like to extend the cv range of the two sequencer rows to 0 - 10V to be able
> to, for example, open the 2600's filter or VCA from minimum to maximum. I suppose this
> could be done quite easily by amplifying the cv outs through an A-133 polarizer [ ], but
> has anyone tried an internal mod to the A-155 to extend the cv range

The lower row on my A-155 outputs 0-7V when the scale knob is turned
all the way up. I don't know if you'd gain much from modding it to
output the extra 3V. I think the idea is that you would normally use
the upper row for precision stuff like VCO's and the lower row for
things that require greater range, like filters. Without bothering to
unscrew my A-155 and try to figure out how I would assume that all you
need to change those ranges is to replace a couple of resistors. But
then, I wouldn't know if those ~7V is the output from the chip(s) that
control which step is active...

Also, if you don't mind me asking, your name could very well be Danish
(or maybe Swedish), so if by any chance you happen to be in or near
Copenhagen and would like to experiment with an A-155 before you buy I
wouldn't mind seeing an ARP 2600 in action so we could probably figure
out something. If I'm totally mistaken you can probably find somebody
within reasonable distance from where you do live that would make the
same kind of offer.

/Silas