Sorry, no pictures or sounds yet. I installed one on one of the prototype VCOs and the thermal frequency variance is gone. Going to begin assembly of 5 VCOs to send to the fine folks who have offered to QA them in the real world.

I finished breadboarding the a +-15V version of the Aries AR-339.

Here is a snippet of audio testing out all of the different filter modes.

My friend Mike finished the comparison build, and it works perfectly.

Now patiently awaiting the arrival of the tempco resistors, and breadboarding the AT-314 VCF.