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\Y'320;\CSTANFORD UNIVERSITY
\F3\CSTANFORD, CALIFORNIA 94305
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CENTER FOR COMPUTER RESEARCH IN MUSIC AND ACOUSTICS\←L\-R\/'7;\+R\→.\→S    Telephone:
ARTIFICIAL INTELLIGENCE LABORATORY\←S\→.(415) 497-4971
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Mr. Roger Englander
Columbia Broadcasting System
524 West 57th Street
New York, N.Y.  10019

Dear Mr. Englander:

\J
	I have enclosed a few examples of my computer music printing system.
 
The input method is relatively simple for anyone with a moderate knowledge
 
of music.   Basically, the note names and rhythms are typed in along with
 
information about the nature and placement of the cross beams, slurs and
 
ties, and various marks like accents, dynamics, etc.   The spacing of the
 
music is automatic, either exactly according to the given rhythm (which
 
isn't often done) or according to what I call a "psuedo-Fibonacci" spacing
 
system (which is more pleasing to the eye.)   If an entire composition is
 
being typed I have a special page organizing program which allows you to
 
cause the music to be printed on any number of full pages with any number
 
of exactly full lines.  
 
	In most cases the speed of typing in the music is faster than hand
 
copy work and of course the result is much better.   Any errors are easily
 
corrected (not so easy with hand work) and if separate players' parts are
 
to be produced these are created in just a few minutes from the score that
 
was typed into the computer.   When transpositions are needed they are done
 
automatically by the part extracting program.
 
	All the work appears on a computer display screen while it is being
 
typed in.   My program has a complete editing capability.   Any item on a page
 
of music can be changed in almost any way desired.   The Xerox proof copies 
 
enclosed are produced by computer-controlled Xerox machine within a minute
 
after a page has been completely set up.   The finer copy (the double sheet of
 
piano music) is first produced at 3.5 times the final size on a "plotter" which
 
draws the image with a felt pen.   This large sheet is then photographically
 
reduced and printed by a standard litho process.
 
	It is not quite clear to me how my process could serve your purposes,
 
however I might venture a few ideas.   At one point when I am producing the
 
Xerox proofs my program makes up what is called a bit matrix of all the dots,
 
black or white, that are to be placed on a 8 1/2 x 11 inch page.   Since the
 
dots are spaced avery 1/200 of an inch we have something over 100,000 dots.
 
The Xerox machine has no grey scale, that is the dots are either black or
 
white.   This contributes to rough edges on this kind of Xerox copy.
 
	If this same image is produced on a TV screen the result is not so
 
good because of the limited number of lines on a TV tube.   However a young
 
man in this lab has devised a system for condensing the Xerox picture data
 
and causing the edges to be smoothed out by using the available grey scale
 
of the TV tube.   The eye somehow thinks it is seeing a fairly sharp image
 
even though it is rather fuzzy around the edges.   Perhaps some system such
 
as this could be used for what you have in mind.
 
	As I mentioned on the phone, I would be happy to show anyone from
 
CBS the things we are doing here.   Also I will probably be in New York 
 
March 20-22 or 22-24.   Why don't you let me know if you would like me to
 
call you when I arrive in order to arrange an appointment.
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Very sincerely,




Leland Smith
Professor of Music
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