If you need only offset und attenuation I'd recommend the new A-138 mixers.
They already include the offset function for input one. Please look at our
web site to the A-138 page for details:

"New: From April 2004 an improved version of the module A-138b is
manufactured. For the revised versions control In1 works as a DC offset
generator (about 0...+5V) provided that no patch cord is plugged into socket
In1. If this feature is not required it can be deactivated by removing a
jumper on the pc board. Probably from summer 2004 even the A-138a will be
manufactured with this improvement."

In the meantime even all A-138a modules in stock feature the offset function
(and the A-138c too).

Only if you need multiple offset+attenuation at the same time and/or the
slew function the A-129-3 is necessary.

Best wishes
Dieter Doepfer

> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com
> [mailto: Doepfer_a100@yahoogroups.com ]Im Auftrag von Pierre Zeeman
> Gesendet: Mittwoch, 10. August 2005 14:48
> An: Doepfer_a100@yahoogroups.com
> Betreff: 1 a129/3
>
>
> Hi all,
>
> Could someone please confirm that I could replicate the attenuation
> and offset functions of the a129/3 in the following way:
> offset: a176 + mixer
> attenuation: a176 + a175 + mixer, or a176 + a138c
>
> Or is there something else going on with the a129/3 that I am missing
>
> t.i.a.