This is an exact hardware replica of the Mutable Instruments Veils 2020 module.  We use the "hard-to-find" OPA1679 opamps, but we did switch the package from TSSOP to SOIC, to keep costs down.  It is the same part/specs, just a different package.

Based on open source designs by émilie gillet under Creative Commons (CC-BY-SA) license.