When recording sounds, you can save it in stereo or mono format. The difference between these types is number of channels. Mono uses 1 channel. Stereo uses more than one channel to create the impression of sound heard from various directions. Mono files are smaller in size, easy to record, and suitable for sound sources of your game. If you use stereo files for sound sources located in your 3D level, Vanda Engine (and other game engines) won’t be able to calculate 3D sound based on the parameters of source and listener. Stereo sounds are more expensive for recording, require technical knowledge to record, and suitable for ambient sounds of your game. In Vanda Engine, ambient sounds have no position and direction, and listener parameters (position and direction) have no effect on their volume and channels.