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AM

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  1. (defun interval-distance (alist n) (let ((alist (if (pitchp (car alist)) (pitch-to-midi alist) alist)) (n (if (pitchp n) (pitch-to-midi n) n))) (loop for i in alist collect (- i n)))) (interval-distance '(c4 d4 b2 e7) 'c4) => (0 2 -13 40) (interval-distance '(c4 d4) 'c4) => (0 2) (interval-distance '(43 44) '41) => (2 3) (interval-distance '(56 48 11) 'c4) => (-4 -12 -49)
  2. is this a solution? ...or some ideas to it... greetings andré ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; (defun gen-resultant (r1 r2 &key (rhy 1/4)) (gen-length (difference (remove-duplicates (sort-asc (flatten (append (cons 0 (gen-accumulate r1)) (cons 0 (gen-accumulate r2))))))) rhy)) ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  3. listen to the processes... (make-omn :pitch (integer-to-pitch (pascal-triangle 50 :johnson-modulo (1+ (random 23)))) :length '(t) :span :pitch) an example with parallel processes (chordized).. (setf chordlist (loop for i in (flatten (integer-to-pitch (pascal-triangle 20 :johnson-modulo (1+ (random 23))))) for j in (flatten (integer-to-pitch (pascal-triangle 20 :johnson-modulo (1+ (random 23))))) for k in (flatten (integer-to-pitch (pascal-triangle 20 :johnson-modulo (1+ (random 23)))))
  4. here is a short program (based on JOHNSON's writing... pascal-code found in www and modified) to generate TOM JOHNSON's series of numbers for "pascal's triangle ...". maybe interesting to play with the MODULO like JOHNSON did (mod 7)... try it! greetings andré ;;; SUB (defun pascal-next-row (a &key (johnson-modulo nil)) (loop :for q :in a :and p = 0 :then q :as s = (if (null johnson-modulo) (list (+ p q)) (list (mod (+ p q) johnson-modulo))) :nconc s :into a :finally
  5. lieber torsten, herzlichen dank! beste grüsse andré
  6. yes, but i do not compose with OPMO - it's too strange with rhythm/instrumentation/notation. most of the time i'm sketching with OPMO and compose "by hand". guitar-scordatura: i thought i'd rather "pull the pitches out of MIDI/XML" and then convert them.. i will see... but, THANX! greetings andré could look like that (excerpt of a piece for solo trp - also with some SORT-ALGORITHMS inside (sketched/calculated with OPMO) works fine with SIBELIUS for layouting etc...
  7. thanks, dear julio, i'll take a look at it, but depending on the situation, programming takes more time than doing it by hand
  8. i am currently working on a piece for piano, guitar and drums. the guitar will have a "scordatura" so that i can do different harmonics and resonances than with the usual tunings. so that I can now make a more readable score, I would like to write the guitar part on two systems: one system as it sounds and one readable for the guitarist (because of the scordatura/fingerings)... it would be nice if we could do a FUNCTION which transforms the "sounding pitch part" (readable in score) into the "guitar-specific-part" (how to play for guitarist)...
  9. dear julio i would code it! you could do a "systematic/formalized sketch" (not in LISP) and with that you would try to program a function best a.
  10. here it is... but NOT microtonal. just for equal tempered tunings it was too complicated (and not necessary) for me to code it (with attributes and cents, it's a bit ... ), so i coded it just for my needs ... for equal tempered tunings... could use it for guitar/strings, just to have a list of your SCORDATURA-harmonics to work with. would be interesting if someone could CODE a function which transforms a "sounding-pitch-guitar-score" into the "play-score". so i wouldn't have to do it by hand... where are the guitar players here? julio? janusz?
  11. thanx! (i'm doing a little function to get all the natural harmonics for guitar tunings equal tempered or microtonal...)
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