Get started with Ambisonics and VR/AR audio with this free first-order Ambisonics panner/encoder that outputs YouTube compatible AmbiX (SN3D/ACN) format. Use it to encode mono or stereo tracks to first-order Ambisonics using a no-frills interface.
Note that Ambisonics requires a decoder to be listened to correctly. You will not have correct results if you listen directly to the output of this plugin.
You can read more about this plugin in a blog post here.