1.Setup a dedicated server for Arma3 with
VonCodecQuality=11 or higher
2. Load up a mission with at least 2 players in it.
3. Join the mission with at least 2 players
4. Use Direct Channel or e.g. vehicle channel (when not in a vehicle) and observe how the voice comms is not heard positionally.
5. repeat above with
VonCodecQuality=10
and observe how voice comms work positionally aka. 3D.