@Eastern

I appreciate the questions, but I personally can't speak intelligently to some of the technical aspects, nor can I give you the "recipe" of our favorite dish;-)  In regards to upsampling, I will forward your comments to our CTO and see if we have that coming down the pipe.  If you email me directly at knutsonk@genaudioinc.com I will put you on our beta list and we would love to have you test new releases.  This company has put 20+ years into R&D, doing years of fMRI scans (fancy way of analyzing how our brains interpret sound) and figuring out if there is a mathematical model we can construct that replicates the same human process to auditory stimuli to localize a sound source in 3 dimensions and we think we have it with AstoundSound.  This is a great application for the "common" user like myself (who just enjoys the enhanced audio), but there is "pro" aspect as well the addresses the hardcore audiophiles out there.

The Listen Modes (Music, Movies, Games) adjust the digital signal processing parameters in such a way as to make the expansion effect more appropriate for the given mode. For example, in Movie mode there is a slight increase in center channel gain and increase in %-Center Bypass. This results in a more prominent center channel, which is more appropriate for movies since dialog is generally in the center channel. Games mode on the other hand, has DSP settings that increase the localized side-signal. This results in an increased expansion effect, which is more appropriate for the sound effects typically found in gaming audio.

@Chris@Eastern

From audiophile or technical standpoint let me describe AstoundSound software for PC or Mac.  GenAudio uses a proprietary digital signal processing (DSP) technology, we call AstoundSound, to create what we term "4D audio". Many 3D audio solutions require specialized encode/decode hardware and/or multi-channel output through 4, 5, 6 or 7 speakers. In addition, most 3D audio solutions provide a 360-degree soundscape, but only on the horizontal plane of the speakers. AstoundSound provides a completely different approach. First, we require no specialized hardware. Our technology is software based. Second, we achieve the 4D experience from as few as 2 output channels (e.g. stereo speakers or headphones). Third not only do we provide a 360-degree soundscape in azimuth, but we also add elevation cues from 90-degrees above to 90-degrees below the  listening position. This creates a spherical soundscape, where the listener is in the center of the sphere. We say "4D" because we not only address azimuth, elevation, and distance, but we also address movement over time (time being the 4th  dimension). Our technology allows us to move sound sources anywhere within the spherical soundscape in real time.
 
Whether you like to just listen to iTunes, Pandora, or play online games or watch Netflix on your PC or Mac, it just gives your audio a kick.

Enjoy!

Kelly 

Recent Reviews
http://www.legitreviews.com/article/1413/
http://www.pcworld.com/article/204580/enjoy_3d_sound_from_your_pc_with_astoundsound_expander.html?tk=rss_main