I only have two ears, how can sound be 3D?

Close your eyes and listen with your ears only. You will realise that you can immediately tell where a sound is coming from. The sound travels from the source to our ears and several things happen before it it finally hits our ear drums:

The first effect is most obvious: The speed of sound is limited and for example a sound coming from your left will arrive to your left ear earlier than to your right ear. Secondly, the same sound will be attenuated on your right ear due to the head shadowing effect. Furthermore, there are sound paths that will hit your torso first and are then delayed and reflected to your ears. Additionally, all these effects are strongly frequency dependent. Your ears are used to all these kind of “artifacts” and decode them as spatial information.

KLANG’s 3D in-ear mixing technology imitates exactly what would happen to e.g. instrument signals around you before they hit your ear drums. A specially processed signal arrives at your in-ear or headphones drivers and contains all spatial cues your ears need to get a full 3D impression to let you immerse into a realistic and transparent sound field.