Conference rdvax::grateful

    Forgot this tid bit:  Says also that
    
    Most of the interest in the product comes from the government
    who is doing research on speech patters.  it is also an efficient way
    of logging audio conversations or storing lots of audio.  
    He said "Alot of people will use it to remove surface noise from music
    and other audio"
    
    RS>
    
    

    
    	The important thing to remember about the DCC is "compression".
    They are removing "sounds" the "ear doesn't hear".
    
    

    I think what they are saying is possible with this product is:
    
    Take a 1969 vintage tape that no one has a great copy of... lets see,
    like the ARK from Boston in 69, sounds okay but could use some help.
    Tape it onto a DAT tape, down load a song into this software,
    clean up the hiss, fix a few notes that drop off, basically clean it
    up and add back to it some of the stuff that the hiss and other noise
    has hidden or blocked out.  Then write it back out to another DAT,
    eventually you have the entire show on DAT again, but its all cleaned
    up and sounds much better.   I would think with all the Ultrix/UNIX
    guru's out there, it won't be long before AI type programs are written
    to help replace lost parts of the music by analysing what notes
    came before and after andd looking at previous versions of sounds by
    the same artist, then FIXING drop outs, etc...  it could mean for us
    at least, a way of taking low gen tapes that have inherent noise and
    cleaning them up.
    
    
    RS>
    

    Yeah, and given enough versions of certain songs, one could come up
    with a complete one, that's different, but the same.  Heck, just dump
    every note that Jerry has ever played onto disk, rearrange 'em a bit,
    and write 'em back out.  "Virtual Jerry"!  :-)

    Don

Back in my college days I witnessed a demonstration of just such a process.
It was a "Signals and Systems" course where they were talking about the wonders
of Fourier transforms and convolution and signal processing and stuff...
Anyways, the instruction brought in an old Enrico Caruso record -- you know,
a 78 rpm classic -- put it on the turntable and played it.  All you could
hear was scratching and hissing and general noise, and maybe there was a
voice back there underneath all of the garbage.  Then he brought out a tape
deck and played a recording of the same record after he had processed the
beejeezus out of it...  It was eerie!  Sounded like a modern studio recording!

It took hundreds of hours of processing back then to acheive such results,
but technology has advanced a lot since then... it won't be long before such
things can be possible even for home systems... geez, maybe we really can get
a "bozo-filter" to cut some of those conversations and war whoops from our
live tapes!     :) :) :)

			-td

    There's already some good processing systems out there.  No-noise is
    one, they used it on Europe 72.  Another is called Cedar, Columbia's
    been using it on their "roots" series, like the Robert Johnson set.  I
    think it makes the music sound a little flat, but it's hard to tell
    without hearing the originals.  The recording equipment used back then
    wasn't too sophisticated so it probably sounded good enough on a
    Victrola.  There's another one that's pc-based that Mickey Hart
    demonstrated on that Smithsonian show a year or two ago.  They can
    isolate one part of a song and eliminate or enhance bits without
    ruining the rest of the music.
    
    Scott
    

Throw them warwhoops and conversations down the Memory Hole!!  ;^)

Re:     <<< Note 221.5 by MAST::DUTTON "Inspiration, move me brightly..." >>>

>Back in my college days I witnessed a demonstration of just such a process.
>It was a "Signals and Systems" course where they were talking about the wonders
>of Fourier transforms and convolution and signal processing and stuff...
>Anyways, the instruction brought in an old Enrico Caruso record -- you know,
>a 78 rpm classic -- put it on the turntable and played it.  All you could
>hear was scratching and hissing and general noise, and maybe there was a
>voice back there underneath all of the garbage.  Then he brought out a tape
>deck and played a recording of the same record after he had processed the
>beejeezus out of it...  It was eerie!  Sounded like a modern studio recording!

	Uh, a digression....

	Was this back when the course was still 6.015?  Was this the fall
	semester of 1975 in 10-250?

	Or was this demo given at other schools also?

	Bob_curious

    I remember hearing that at MIT around '73 or so.

RE: .8

Yup, it was 6.015, fall semester, 1975, back at the old 'tute.

You were at the same demo, eh?  :)
It was that demo that set my career directions for the following 10 years...

	-Todd

Re:    <<< Note 221.10 by MAST::DUTTON "Inspiration, move me brightly..." >>>

> Yup, it was 6.015, fall semester, 1975, back at the old 'tute.
>
> You were at the same demo, eh?  :)

	Yep, I was there.  Another case of "Small world, isn't it?"

	Bob