I was not in the market for another digital oscillator but when I saw this on Muffwiggler forums I really wanted to build it. This is a dual stereo oscillator with built in modulators and utilities based on a teensy 3.6.

I picked up the PCB and the panel from Michigan Synth Works.
https://michigansynthworks.com/

The build was actually not that hard but just dense with parts. The only really frustrating part was all the parts I kept forgetting to order and having to wait for them.

Block diagram of signal path. Image by Neutron Sound

Testing this dirty PCB before I gave it a good cleaning. This new iPhone camera brings out every piece of dust/hair/flux residue.