From: Jim Meissner (jpmeissner_at_mindspring.com)
Date: 2002-01-02 03:07:38
Dear Joerg:
> There is at least some evidence, that it works:
> Some days ago I visited a friend who seemingly needed some coffee:
> Accidentally at this time an annoying fly was buzzing around him.
> He tried about twenty times to catch it and gave up.
> After listening to the sound for some minutes, he was able to
> get the fly in only two attempts.
A non-believer would tell you that the fly got tired!
Sounds cannot change human performance or slow down the tennis ball!
( I am joking! )
> At 96kHz sample rate you get 10.4us resolution.
Does that mean that at 44100 it would be 20.8 us? That might be a bit jerky but maybe OK, I would have to hear it.
> I have experimented with delays up to 1000us and could definitely
> not tell the difference between 1000us and 500us. (So maybe I have
> problems with my ears ;-) )
I would not have believed that a biological system could respond to even millisecond delays. I was shocked when I discovered this. Try it again withtwo identical 3 msec. pulses. Shift the phase by 100 us and you will be surprised how sensitive the ear/brain system is to establishing the apparentdirection. This sense has kept man alive for thousands of years. A largepart of the brain is devoted to keeping track of his sonic environment.
> If you have a skeleton of the code that works I would be willing
> to try to fine tune it.
> The source is in the separate email too.
> Alternatively you could tell me what could be improved and
> I implement it.
I was able to get your program to run. Nice job. Even though the frequencies went from 10 to 20 hz, I found it very annoying to listen to. Much of the programming of the sound sequence is art. I spent months fine tuning the frequencies. My joke is that Jimmy Hendrix and Andre Segovia both playedthe guitar, but what a difference.
I looked at your code and will need a few hours to study it. If I am able to remember how to program in C, I would prefer to modify the code on my computer and do the fine tuning here. Would you be willing to set me up withthe programs needed to compile the C code and run it here? I have a Compaq Presario 1250, with Win98.
Years ago I hired a programmer to write the core program and then I was able to push variables around until it sounded "right". There are about 12 variables that control all the programs in my Brain State Synchronizer. These are called up from the EPROM and loaded into the program and run. On thePC these could be in a BAT file that the program looks at and executes. During development it would be nice to have an on screen edit of the variables, and then to save that to a file for future use.
What do you think?
Juergen P. (Jim) Meissner
Check out my Website at www.MeissnerResearch.com
Read about the benefits of the Brain State Synchronizer sounds for improving your life and health.
----- Original Message -----
From: Joerg Hansmann
To: buildcheapeeg_at_yahoogroups.com
Sent: Tuesday, January 01, 2002 12:08 PM
Subject: Re: [buildcheapeeg] Re: Meditation - UP mode
Hi Jim,
----- Original Message -----
From: Jim Meissner <jpmeissner_at_mindspring.com>
To: <buildcheapeeg_at_yahoogroups.com>
Sent: Monday, December 31, 2001 6:24 PM
Subject: Re: [buildcheapeeg] Re: Meditation - UP mode
>Dear Joerg:
>
>I would be very interested to see - hear what you have written.
OK. You should have it now in a separate email.
It works with win9x (e.g. Windows 98)
>I am not a programmer but I work at it. So far as I am aware,
>it is not possible to get accurate microsecond timing when addressing
>the sound card to generate pulses.
At 96kHz sample rate you get 10.4us resolution.
>Maybe you have the answer? ( BTW
>a 10 microsecond difference is significant! )
Speed of sound in air is about 300m/s.
So 10us is equivalent to 3mm runlenght difference. Why should that
be so important when a sound-source is positioned from left to right
and reverse ?
I have experimented with delays up to 1000us and could definitely
not tell the difference between 1000us and 500us. (So maybe I have
problems with my ears ;-) )
>With my Brain State Synchronizer, I use Small "C" and the pulse
>routines are written in machine code to get the speed.
>
>If you have a skeleton of the code that works I would be willing
>to try to fine tune it.
The source is in the separate email too.
Alternatively you could tell me what could be improved and
I implement it.
>Let's see if you got something that works before you worry about
>option 1) or 2) or others.
There is at least some evidence, that it works:
Some days ago I visited a friend who seemingly needed some coffee:
Accidentally at this time an annoying fly was buzzing around him.
He tried about twenty times to catch it and gave up.
After listening to the sound for some minutes, he was able to
get the fly in only two attempts.
Regards,
Joerg
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