External OSC Very Very Very Quiet

I just tried for the first time to use the audio input as external OSC (via OT outputs) and it seems no matter how hard I drive the inputs. OT mixer is set to plus 64, all levels are max, A4 volume, gain and OSC level are all max, filters wide open and the signal is barely useable, especially not in context to internal voices which are still much louder even with everything cranked to max on the ext OSC…

I searched the forum, found some reference to the OSC being quiet when using external audio but this is beyond quiet. This doesn’t seem right. I have an early production A4, is there maybe a possibility there was some issues with using external audio for OSC input in early rev 1 models?

Another quick question… Despite the Overbridge control panel clearly showing the ext audio input signal, this signal is not available via Overbridge VST??