Hello

>> press and hold C and while holding the note switch the
>> footage>setting 16"> 8"> 4"> 2"> 4"> 8"> 16"> of the VCO4.
>> When you>are back at 16" then release the key. Is there a
>> portamento caused by switching the octaves
> Portamento Pot is ON/OFF same behavior: it stays on I did the
> sequence slower, fast and very fast and portamento is there.

AAARRRGH!!!! You are mixing up things. Do not use a sequencer!!!! Stay
with one thing if you try to track down a failure. Never change two
variables at the same time!!!

Please do only this:
* Don't connect anything else to the Monopoly but Audio out to your
monitoring! No CV not gate nothing. Only Audio! Or use the headphone.
* Switch on the Monopoly and wait for 15 Minutes
* Do not play any note.
* After 15 Minutes press Unisono
* Do all settings on the synth like shown in
http://fa.utfs.org/diy/korg_monopoly/mp_20_adjustment_1.gif with
exception that you turn up VCO4 to 10 (instead of VCO1 in the picture)
* Press Hold
* Press C-Key: You should hear VCO4 play a steady tone.
* Do NOT play any other key while this procedure!!!
* Switch the octave setting of VCO4 to 8" then to 4", then back to 8"
and back to 16".

Do you hear portamento when switching the octave as described in the
last step

Florian