Hello,
I transferred a CD of a hemi-sync song "Between two worlds" that i purchased onto my Ipod. I just noticed that the ipod converts the song to AAC format (apple audio) and condenses the file size by about half. 

My question is if the effects of hemi-sync are greatly reduced by this?
Thanks.

I, too, see no problems in compressing HemiSync material. It has to be stereo though, but I guess the conversion software won't convert to mono unless it is custom-set this way.

Btw, this conversion to the apple sound format, the DRM pratices, adware in itunes and it's altering the computer's OS is one reason why I haven't purchased an ipod but an mp3 player.

Spooky

The actual files on the computer in the control room are WAV files, at 14,400 bps. If you have a big ipod or mp3 player, you can use this format with no loss whatsoever. The drawback is that these files are huge.

But using the default on itunes, it seems to work just fine. Remember that the actual binaural part of the signal is less than 0.5% of the total audio signal, and everything you are actually hearing is sound effects. You cannot hear the binaural beat, or waver, no matter how loud you turn it, and what format you use to transfer it.

I have a program called bavsa which decodes binaural recordings, lists the carrier frequency, the binaural beat frequency, and the percentage of the whole audio signal it is every ten seconds. It works great on the Monroe recordings (which I then duplicate using www.bwgen.com with no talking on it).

Thomas

Thanks everyone for the very helpful info.