Weirdness with Sync & Fundamental VCOs

Here’s an example patch: SyncWeirdness.vcv (26.6 KB)

The original question came from Andrew Charles Barnes Bellemer.

The issue: If you sync a Fundamental VCO-2 (similar behavior observed in VCO-1), the sync’ed oscillator has a weird DC offset. It’s illustrated in this capture of 2 fundamental Scopes. The synced oscillator is the magenta trace. The right hand scope shows the signals after passing through a Nysthi 4DCB to remove the DC offset.