Core Sound - The Importance of Individual Calibration for Ambisonic Microphones Fedele De Marco asked about the importance of calibration for ambisonic microphones. He also asked which of the manufacturers do calibration.
Overview - Sennheiser Ambeo Ambisonics Microphone And Workflow at BVE 2017 | Pro Tools - The leading website for Pro Tools users
Brahma: Affordable Ambisonics Microphone by Embrace Cinema Gear USA LLC — Kickstarter