Near-Field HRTF comparison: CMSS-3D vs OpenAL Soft spatial sound 🎧
21Use headphones only with any virtual surround features turned off. Listen with your eyes closed for the most accurate results.
0:15 CMSS-3D (MacroFX on)
1:39 OpenAL Soft
This video is supplementary to a previous comparison I made between Hardware X-Fi, Software X-Fi, and OpenAL Soft HRTF. It shows off one of the biggest weaknesses of OpenAL Soft as an HRTF provider: it lacks the all-important Near-Field HRTF. Known as "MacroFX" on the CMSS-3D and its predecessor by Sensaura, this feature allows for much greater positional audio within one meter of the audio listener source. Read this link for more information:
https://www.oculus.com/blog/beyond-surround-sound-audio-advances-in-vr/
Without Near-Field HRTF, it becomes impossible to determine if a sound is closer than an arm's reach with OpenAL Soft. Granted, this won't really come up that often in gameplay, but it does affect certain sounds like missed Brute rockets in Unreal Gold vs Aureal A3D 2.0. This video was tested with the built-in KEMAR tables on OpenAL Soft for a more direct comparison with CMSS-3D's "average head" HRTF table. OpenAL Soft sound in RightMark 3DSound program was achieved using DSOAL.
Links:
http://audio.rightmark.org/products/rm3ds.shtml
http://kcat.strangesoft.net/dsoal-bin.zip
https://www.reddit.com/r/oculus/comments/1fzonq/psa_for_games_using_openal_including_minecraft/
http://sound.media.mit.edu/resources/KEMAR.html
http://kcat.strangesoft.net/openal.html
https://github.com/kosumosu/x3daudio1_7_hrtf
Credits:
Hep Cats Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/
(Trimmed for time.)
Running Water templeofhades (https://freesound.org/people/templeofhades/sounds/233406/)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/
File was reduced to just mono channel (no phasing) for use in 3D positional audio program.
OpenAL Soft is licensed under GNU Lesser General Public License.
RightMark 3D Sound Positioning Accuracy Test is copyrighted by RightMark. Use of this program falls under fair use for educational purposes.
MIT KEMAR tables copyrighted 1994 by MIT Media Laboratory;
Bill Gardner (billg@media.mit.edu) and Keith
Martin (kdm@media.mit.edu)
#3dsound #spatialaudio #binaural #3daudio #360audio #8daudio #hrtf #headphones #audiophile #gameaudio #mod
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