Due to the nature of isochronic tones, a square wave(of the
entrainment frequency) filled with a higher frequency tone, not very
effectively. Consider that entrainment occurs as a response to a
rhythmic stimulus. So if you create an isochronic tone at say 20 HZ
(beta) and an alpha one at 10 Hz, then if they are in phase with each
other your 10 Hz tone gets clobbered by every other 20 Hz cycle. Net
result - 20 Hz. If they are a bit out of phase, you get a syncopated
effect and may actually have better entrainment at tone1 + tone2 at 30
Hz.

Try mixing different methods to get where you want to be.
Autopanning, low pass filter modulation, amplitude modulated pulses
can be mixed effectively.

Depending on how serious you are, a small EEG is handy in watching for
entrainment. They can be found on Ebay for under $1000. There was a
16 channel Grass unit for $750 this morning. That seems like overkill
but you can go with the OpenEEG stuff and have a homebuilt 4 channel
for around $400. Hook up to an old computer, run one of the easy to
use (and read) open source apps, put the electrodes on, put on the
headphones, lay back and record what happens for 30 mins or so. Get
up and see where the entrainment occurred. This can be real handy,
not only for designing your own but for seeing whether or not the
presets you downloaded are real or junk.

Hope this helps.

Dr. Richard Price
RCP Consulting
http://www.rcpconsulting.us
Check out our St. Patrick's Day Specials and the new Massive Weight
Loss Program on our website.




--- In bwgen@yahoogroups.com, BLKSUPERMN@... wrote:
>
> Is it possible to listen to more than one isochronic tone at once?
If so, how
> many tones can the brain handle before there is an overload or
confusion. Any
> info would be great. Thank you.
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