Neovintage wrote: ↑Sat Jan 18, 2020 4:45 am
Yes the bottom one is for "line level" output. But I never saw the upper one. Really don't know what it is. Ask Rob. And please post the answer here
Eureka. Reply from Rob:
"In principle all connectors are DC-coupled, meaning that audio and LFO signals that swing around ground can be freely mixed with CV signals that may be at a constant positive or negative voltage. Th golden plugs have a capacitor inside, which does pass audio signals but block any constant positive or negative CV voltage (=the DC-part of a signal). This may sometimes be of interest.
You can check the difference by feeding a LFO pulse into the A or B audio input of the Twinpeak filter, set at a high resonance. If you couple it directly you hear that there is a slight 'dunk' in the pitch, like if the filter was modulated slightly by a short-decay envelope. But if you route that LFO pulse through the matrix using a golden plug before going into the filter you hear that the 'dunk' has gone and the pitch seems steady. Btw, myself I like the 'dunk', its more organic.
Another use is if you feed that same LFO pulse through a golden plug to a ringmodulator, e.g. to the mod input of a bipolar VCA or the mod input of the RM/VCA in the Waveshaper or Fader in RM mode. It is now only the flanks of the pulse that shortly open the RM and you get a rhythmic effect.
A third use is when you connect a signal from the outside world that comes from e.g. a device powered by only five volts e.g. USB powered). Some of these devices have the output swing around +2.5V instead of around ground, and then you can remove that +2.5V component in the signal with a golden plug before further processsing. This was actually the main reason why I added this plug, as some system owners badly needed this."
