Thanks corum_beasley,
To show some great possibilities that's easier and perhaps even possible to do using the Electronic Switchs missing C to A & B routing - i add the following text from "Fundamentals Of Music Technology - The ARP 2600" Volume One second edition - by Samuel Ecoff:
THE ELECTRONIC SWITCH IN PRACTICE
There are hundreds of potential uses for the electronic switch, only a few of which are presented here.
They basically fall into one of two categories: patches which use distribution and patches which use
source switching.
In the basic distribution patch, jack C is an input, and the incoming signal is alternately distributed to
jack A and jack B. One unique possibility with this configuration is a panning patch. If a sound source
such as an oscillator (or the VCF’s output, for that matter) is connected to jack C, and jacks A and B are
connected to the LEFT INPUT and RIGHT INPUT jacks in the mixer section, the sound coming into
jack C will be switched between the left and right speakers. This can be heard on CD track 51.
078 - SECTION TEN: S/H MODULE
Yet another wonderful possibility is to connect a control source, such as an LFO to jack C, and then
connect jacks A and B to the FM inputs on two different oscillators. When the outputs of these oscillators
are brought up in the filter and sent to the mixer, the two will be alternately modulated. CD track 52
Another favorite technique is to connect the output of the last module in a patch to jack C, and connect
one of the two remaining jacks to the mixer. In this configuration, the switch will switch between the
patch and silence which creates a wonderful pulsing sound. When combined with a resonant filter
sweep, this creates a sound which is very popular in today’s dance music. This sound can be heard on
CD track 53.