elevation

The elevation property moves a sound up or down. In an optimal listening environment, the soundstage is considered to be parallel to the floor, with origin point at the listener's head. This property specifies the vertical angle from the soundstage plane giving up or down angle references as a location for a tag.

You specify the elevation as an angle between -90deg and 90deg. For example:

p  { elevation: 60deg}
p  { elevation: 30deg}

Note that 0deg means on the forward horizon (more or less level with the listener). Positive values move the sound up, negative ones move it down. So, 90deg means directly overhead and -90deg means directly below.

You can also specify a keyword. For example:

h1 { elevation: above}
p  { elevation: level}

The keyword corresponds to an angle and can be one of the following:

• Below. This is the same as -90deg
• Level. This is the same as 0deg
• Above. This is the same as 90deg
• Higher. Adds 10 degrees to the current elevation
• Lower. Subtracts 10 degrees from the current elevation

Finally, remember that if you increase the elevation, you lessen the effect of azimuth changes (the bit that moves sound round rather then up or down). If a sound is directly overhead, you can't tell if it is in front of you or behind you.