"!The VCA Output of the Synthesizer Box module is internally patched to the Left and Right inputs of the Outs module. The internal patching can be disrupted by plugging a patch cable into the Left input of the Outs module.
!The Midi2 module Gate1 is internally patched to the 1V/O input of the Synthesizer Box module. The internal patching can be disrupted by plugging a patch cable into the 1V/O input of the Synthesizer Block module.
!The CV1 Output is internally patched to the Envelope input of the Synthesizer Box module. The internal patching can be disrupted by plugging a patch cable into the Envelope input of the Synthesizer Box module.
"
from user manual...
drone patch. of course, in a performance, all parameters can change, but this is a nice way to begins.
and there's some internal connections given by pittsburgh system from factory.