World: r3wp

Gregg that binaural beat thing looks very interesting. I was interested 
in in ELF (extreme low frequencies) some time ago, but I though you 
need some pretty expensive equipment for it (as normal speakers cannot 
play 7Hz wave very well, but after reading a book by V. Marek, I 
found, that 7Hz frequency can be easily simulated by using one wave 
of frequency X and second wave of frequency X+7Hz. The 7Hz freq. 
is then created thanks to modulation, regardless on equipment. It's 
very interesting, unfortunately I had no time to get deeper into 
this field.

Yes, interesting, and with good headphones you can get subsoncis; 
SBAGen even offers boost options, by frequency, so you can tailor 
the compensation to your equipment.

I've heard that Enya's albums are 'enhanced' by some ELFs, but this 
may be just some urban legend (the reasoning was something like the 
music sounds so positive because it's using some brainwaves stuff, 
but maybe it's all bogus. Actually I bought two MCs from Enya some 
10-15 years ago and I cannot expect so wide freq. spectrum from cassette, 
but the music is still positive enough ;)

:-)  SBAGen, or some other app, has an analysis utility that will 
show you the binaural beats embedded in tracks. SBAGen also lets 
you mix the beats with other sounds, so you could add them to Enya's 
stuff yourself. :-)

can you describe what are binaural beats?

Low freq waves, played through headphones, with different "beats" 
going to each ear; designed to induce/stimulate certain brainwave 
states or patterns.

and these modify your mood, for example?

or make you feel light, or sense gravity, etc?

There are a lot of claims and potential uses.

so basically subliminal sound, just like subliminal images.

I haven't done deep research, but mainly I view them as something 
like a "helper" for meditation, self-hypnosis, etc.

There is another script of the PSG AY-3-8910 from Guest2, it's here 
http://www.rebol.org/cgi-bin/cgiwrap/rebol/view-script.r?script=demo-ay.r

His script was my inspiration and is much more nice than mine. But 
I wanted to understand by myself.

Question : How does work the barb opcode ?

Another question : Is possible to do something like a call within 
rebcode ?

Use the APPLY opcode to get access to any REBOL function. Watch out 
though: When last I checked, repeated calls to APPLY could crash 
REBOL - some kind of leak, I guess.

I forget how many calls were required.

APPLY is quite slow as well, at least when compared to rebcode in 
general.

I guess its because of all of tha context navigation which rebocode 
is freed of.

darn, why does that damn "o" always get added when I write rebcode 
quickly..

I think that function calls recurse into the interpreter.

BRAB is for branch tables like that generated by switch statements 
in C. Words in the target block are changed by the assembler into 
integer offsets to their associated label statements. Any other use 
is only appropriate for compiler-generated rebcode.

As for an equivalent to NONE?, SETT might work.

Looking back on this group, it seems that the APPLY bug may have 
been fixed. Also, BRAB is good for use on the results of CMP or SIGN.

As for reversing the bits in a byte, have you considered a binary 
lookup table?

steeve... told you brian was the reference here  :-)

It's been a while - for some I had to go back and look at my own 
posts :)

is rebcode still incapable to lookup objects?

(still as in... did the last version still have that limitation)

That was part of the planned upcoming features, and then they stopped 
updating it. I recall creating a comprehensive proposal...

You can still APPLY IN and then GETW or SETW.

rebcode really has to be part of 2.7... if we could just have object 
lookup, that would allow me try to make a few tests with liquid and 
mayb optimise so its about 10-30 times faster at managing the dataflow 
 :-)

Have you tried it with APPLY IN and such? How is the speed compared 
to REBOL?

I have not yet done any rebcode tests with liquid, as so far, its 
always interactive enough, so as to not require it... but I am going 
nuts with the engine  ;-)  liquidator is a testament to its stability 
and another user here is helping me push the enveloppe to  :-)


but obviously, It will come to a point where pure processing will 
be needed and in such a case, speed will always be a factor.

going nuts as in "I'm having a lot of fun with it"  :-D  the apis 
is pretty complete for most gui and procedural

(needs)

I didn't know about APPLY IN ... I might just do a quick try in a 
little while...  does 'APPLY support refinements?

Yes, as positional true/false arguments. IN doesn't have any refinements.

ok ... yes... I remember that part about the ordering of apply...

If you change the order that the refinements are declared in the 
function, you will need to change all calls by APPLY to match.

I think true/false will work - it might need true/none.

its probably true/none

It's probably both.

hum... in any case, thanks for remining me about APPLY IN  :-)  you've 
revived my interest in rebcode (even if I might now rely on some 
features of 2.7)

here am i ^^^

It is really the best way to work with objects in efficient code, 
so much so that I requested an IN opcode.

Hi Steeve!

glad you did  :-)

IN doesn't work with structs though, so I requested a set of struct 
opcodes to work with them (SET.S, GET.S, ...).

that would probably be even faster.

since its a simple shift