Effect of MP3 on Stereo Subliminals/Hemi-Sync, Esp. JS... Does it affect the effect? Options

[Supacon]

I was wondering if anyone out there who has ever worked with holographic subliminal messages in audio, or hemi-sync (where slightly different frequency tones are played in each ear through headphones) have experimented with, or at least read of a study done to see if lossy audio encoding has a destructive effect on these technologies.

I'm concerned that subliminal audio and hemi-sync might partly be based on sounds that the human brain doesn't readily perceive, and thus the encoding process might "throw away" sound that is required for subliminal audio to be effective.

I'm especially concerned about whether joint stereo will wreck the effect of these techniques, since they are based on stereo separation of sound. Would it? Should I force encoding to actual stereo, or is Joint Stereo okay for this stuff?

I try to use lossless for this stuff wherever possible, but obviously that's not always practical.

Any informed responses much appreciated!

[sketchy_c]

So when a company releasing this type of audio states that only uncompressed files will work, what is its motivation/cause to do so? Cursory testing of lossy/lossless codecs? Maintaining a simple, easily-enforcable product support policy?

This post has been edited by sketchy_c: Dec 18 2006, 23:37

[Pio2001]

So when a company releasing this type of audio states that only uncompressed files will work, what is its motivation/cause to do so?

You have to tweak the command line options in order to get a proper lossy encoding (enforcing CBR in mp3). The standard setup of a lossy encoder produces a poor result.
Why not try other codecs ?