Design Labs Prologue

[nuromantix]

I've had this MIDI>CV converter for years and not had any major problems.
Have always had a couple of problems though, I wonder if anyone here is an expert on it:

1. "channel 5" aka the MIDI filter doesn't seem to work. the MIDI thru socket continues to echo all MIDI channels. the SYNC out doesn't output any MIDI. I wonder if I need to make a custom cable to use the SYNC output as a MIDI out, or if they just didn't implement MIDI filtering despite what it says in the manual.

2. portamento time seems to be universal for all 4 CV/gate channels. has anyone ever managed to get portamento on only 1 or 2 or 3 out of the 4 synths connected?

yes I have read the manual!

thanks