Artists in DSP released Transpanner, a freeware 3D audio panning tool for Windows (coming soon) and macOS in VST3 and AU plugin formats.
Transpanner is a 3D audio panning effect optimized for use with stereo speakers.
It features an intuitive user interface with two controls. The main knob controls the 3D position of your audio, the Rear Filter slider enhances the front/rear placement of the audio, and the Loudspeakers Distance slider optimizes the audio according to your monitor placement.
Thanks to its clean design and self-explanatory controls, Transpanner is very easy to use. Simply load it on a stereo channel and adjust the controls until you get the desired sound.
I tested Transpanner with a pair of studio monitors and my studio headphones, and it performed well in both cases. The effect sounds convincing when listened to through a pair of speakers. It works well on headphones too, but you should apply some subtle stereo reverberation to make it sound more natural.
You can hear the effect in action in the demo video below.
There are many ways to use a 3D panner in your audio setup, whether as a tool for mixing music or a special effect for sound design. One interesting option is to load it on a background element in a mix, for example, a pad or a soundscape, and automate the effect to get some interesting movement out of it.
Transpanner is free to download from Artists in DSP’s official Gumroad page. You can download it free of charge or send a donation to support the developer’s work.
CORRECTION: The Windows version is expected soon.