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diff --git a/presets/presets.txt b/presets/presets.txt new file mode 100644 index 00000000..541416e2 --- /dev/null +++ b/presets/presets.txt @@ -0,0 +1,42 @@ +Ambisonic decoder configuration presets are provided here for common surround +sound speaker layouts. The presets are prepared to work with OpenAL Soft's high +quality decoder. By default all of the speaker distances within a preset are +set to the same value, which results in no effect from distance compensation. +If this doesn't match your physical speaker setup, it may be worth copying the +preset and modifying the distance values to match (note that modifying the +azimuth and elevation values in the presets will not have any effect; the +specified angles do not change the decoder behavior). + +Details of the individual presets are as follows. + +square.ambdec +Specifies a basic square speaker setup for Quadraphonic output, with identical +width and depth. Front speakers are placed at +45 and -45 degrees, and back +speakers are placed at +135 and -135 degrees. + +rectangle.ambdec +Specifies a narrower speaker setup for Quadraphonic output, with a little less +width but a little more depth over a basic square setup. Front speakers are +placed at +30 and -30 degrees, providing a bit more compatibility for existing +stereo content, with back speakers at +150 and -150 degrees. + +itu5.1.ambdec +Specifies a standard ITU 5.0/5.1 setup for 5.1 Surround output. The front- +center speaker is placed directly in front at 0 degrees, with the front-left +and front-right at +30 and -30 degrees, and the surround speakers (side or +back) at +110 and -110 degrees. + +hexagon.ambdec +Specifies a flat-front hexagonal speaker setup for 7.1 Surround output. The +front left and right speakers are placed at +30 and -30 degrees, the side +speakers are placed at +90 and -90 degrees, and the back speakers are placed at ++150 and -150 degrees. Although this is for 7.1 output, no front-center speaker +is defined for the decoder, meaning that speaker will be silent for 3D sound +(however it may still be used with AL_SOFT_direct_channels or ALC_EXT_DEDICATED +output). A "proper" 7.1 decoder may be provided in the future, but due to the +nature of the speaker configuration will have trade-offs. + +3D7.1.ambdec +Specifies a 3D7.1 speaker setup for 7.1 Surround output. Although it's for 7.1 +output, the speakers for such a configuration need to be placed in different +positions for proper results. Please see docs/3D7.1.txt for more information. |