ensemble/get-players [ Methods ]
[ Top ] [ ensemble ] [ Methods ]
DESCRIPTION
Return the IDs of the players from a given ensemble object.
ARGUMENTS
- An ensemble object.
RETURN VALUE
- A list of symbols that are the player IDs of the given ensemble object.
EXAMPLE
(let ((ens (make-ensemble 'ens '((flt ((flute piccolo) :midi-channel 1)) (clr ((b-flat-clarinet))) (tpt ((b-flat-trumpet c-trumpet) :midi-channel 2)) (vln ((violin)))) :instrument-palette +slippery-chicken-standard-instrument-palette+))) (get-players ens)) => (FLT CLR TPT VLN)
SYNOPSIS
(defmethod get-players ((e ensemble))
ensemble/make-ensemble [ Functions ]
[ Top ] [ ensemble ] [ Functions ]
DESCRIPTION
Make an ensemble object, specifying the players and associated instruments. NB: If you have an ensemble with a player doubling two instruments, be sure to indicate some keyword argument or other as (fl1 ((piccolo violin) :midi-channel 1)) works but (fl1 ((piccolo violin))) thinks that piccolo is a nested ensemble!!! NB: The argument :instrument-palette is a required argument although it is a keyword argument.
ARGUMENTS
- An ID consisting of a symbol, string or number. - A list of 2-element sublists that define the ensemble. See the above comment on adding a keyword argument for doubling players.
OPTIONAL ARGUMENTS
keyword arguments: - :instrument-palette. An instrument palette object. This is a required argument. - :bar-line-writers. Obsolete as no longer used.
RETURN VALUE
An ensemble object.
EXAMPLE
(let ((ens (make-ensemble 'ens '((flt ((flute piccolo) :midi-channel 1)) (clr ((b-flat-clarinet)))) :instrument-palette +slippery-chicken-standard-instrument-palette+))) (print ens)) => ENSEMBLE: bar-line-writers: NIL players: (FLT CLR) (id instrument-palette): SLIPPERY-CHICKEN-STANDARD-INSTRUMENT-PALETTE RECURSIVE-ASSOC-LIST: recurse-simple-data: T num-data: 2 linked: T full-ref: NIL ASSOC-LIST: warn-not-found T CIRCULAR-SCLIST: current 0 SCLIST: sclist-length: 2, bounds-alert: T, copy: T LINKED-NAMED-OBJECT: previous: NIL, this: NIL, next: NIL NAMED-OBJECT: id: ENS, tag: NIL, data: ( PLAYER: (id instrument-palette): SLIPPERY-CHICKEN-STANDARD-INSTRUMENT-PALETTE doubles: T, cmn-staff-args: NIL LINKED-NAMED-OBJECT: previous: NIL, this: (FLT), next: (CLR) NAMED-OBJECT: id: FLT, tag: NIL, data: [...] data: ( INSTRUMENT: lowest-written: [...] NAMED-OBJECT: id: FLUTE, tag: NIL, [...] INSTRUMENT: lowest-written: [...] NAMED-OBJECT: id: PICCOLO, tag: NIL, [...] PLAYER: (id instrument-palette): SLIPPERY-CHICKEN-STANDARD-INSTRUMENT-PALETTE doubles: NIL, cmn-staff-args: NIL LINKED-NAMED-OBJECT: previous: (FLT), this: (CLR), next: NIL NAMED-OBJECT: id: CLR, tag: NIL, data: INSTRUMENT: lowest-written: [...] NAMED-OBJECT: id: B-FLAT-CLARINET, tag: NIL, )
SYNOPSIS
(defun make-ensemble (id ensemble &key bar-line-writers instrument-palette)
ensemble/num-notes [ Methods ]
[ Top ] [ ensemble ] [ Methods ]
DESCRIPTION
Get the number of attacked notes in a given slippery-chicken object. This method accesses the ensemble object within the given slippery-chicken object to perform this task.
ARGUMENTS
- An ensemble object.
RETURN VALUE
An integer that is the total number of attacked notes in the given slippery-chicken object.
EXAMPLE
(let ((mini (make-slippery-chicken '+mini+ :ensemble '(((vn (violin :midi-channel 1)) (vc (cello :midi-channel 2)))) :set-palette '((1 ((f3 g3 a3 b3 c4 d4 e4 f4)))) :set-map '((1 (1 1 1 1 1))) :rthm-seq-palette '((1 ((((2 4) e e e e)) :pitch-seq-palette ((1 2 3 4))))) :rthm-seq-map '((1 ((vn (1 1 1 1 1)) (vc (1 1 1 1 1)))))))) (num-notes (ensemble mini))) => 40
SYNOPSIS
(defmethod num-notes ((e ensemble))
ensemble/num-players [ Methods ]
[ Top ] [ ensemble ] [ Methods ]
DESCRIPTION
Get the number of players in a given ensemble object.
ARGUMENTS
- An ensemble object.
RETURN VALUE
- An integer.
EXAMPLE
(let ((ens (make-ensemble 'ens '((flt ((flute piccolo) :midi-channel 1)) (clr ((b-flat-clarinet))) (tpt ((b-flat-trumpet c-trumpet) :midi-channel 2)) (vln ((violin)))) :instrument-palette +slippery-chicken-standard-instrument-palette+))) (num-players ens)) => 4
SYNOPSIS
(defmethod num-players ((e ensemble))
ensemble/players-exist [ Methods ]
[ Top ] [ ensemble ] [ Methods ]
DESCRIPTION
Produce an error message and drop into the debugger if the specified player IDs are not found within the given ensemble object.
ARGUMENTS
- An ensemble object. - A list of symbols that are the IDs of the players sought.
RETURN VALUE
NIL if the specified player ID is present within the given ensemble object, otherwise drops into the debugger with an error.
EXAMPLE
;;; Returns NIL if a player with the specified ID is found in the given ;;; ensemble object. (let ((ens (make-ensemble 'ens '((flt ((flute piccolo) :midi-channel 1)) (clr ((b-flat-clarinet))) (tpt ((b-flat-trumpet c-trumpet) :midi-channel 2)) (vln ((violin)))) :instrument-palette +slippery-chicken-standard-instrument-palette+))) (players-exist ens '(vln))) => NIL ;; Drops into the debugger with an error if no player with the specified ID is ;; found in the given ensemble object. (let ((ens (make-ensemble 'ens '((flt ((flute piccolo) :midi-channel 1)) (clr ((b-flat-clarinet))) (tpt ((b-flat-trumpet c-trumpet) :midi-channel 2)) (vln ((violin)))) :instrument-palette +slippery-chicken-standard-instrument-palette+))) (players-exist ens '(vla))) => ensemble::players-exist: VLA is not a member of the ensemble [Condition of type SIMPLE-ERROR]
SYNOPSIS
(defmethod players-exist ((e ensemble) players)
ensemble/tessitura [ Methods ]
[ Top ] [ ensemble ] [ Methods ]
DESCRIPTION
Get the average pitch of a given slippery-chicken object. This method accesses the ensemble object within the given slippery-chicken object to perform this task. NB: This method processes data in relationship to degrees of the current tuning system (scale), which is quarter-tone by default. It is therefore possible, when generating a piece using only chromatic pitches but within a non-chromatic tuning to get microctonal results.
ARGUMENTS
- An ensemble object.
RETURN VALUE
An integer that is the average pitch of the given slippery-chicken object in degrees.
EXAMPLE
;;; Change the tuning to chromatic first to get an accurate result: (in-scale :chromatic) => #<tuning "chromatic-scale"> (let ((mini (make-slippery-chicken '+mini+ :ensemble '(((vn (violin :midi-channel 1)) (vc (cello :midi-channel 2)))) :set-palette '((1 ((f3 g3 a3 b3 c4 d4 e4 f4)))) :set-map '((1 (1 1 1 1 1))) :rthm-seq-palette '((1 ((((2 4) e e e e)) :pitch-seq-palette ((1 2 3 4))))) :rthm-seq-map '((1 ((vn (1 1 1 1 1)) (vc (1 1 1 1 1)))))))) (tessitura (ensemble mini))) => C4
SYNOPSIS
(defmethod tessitura ((e ensemble))
recursive-assoc-list/ensemble [ Classes ]
[ Top ] [ recursive-assoc-list ] [ Classes ]
NAME
ensemble File: ensemble.lsp Class Hierarchy: named-object -> linked-named-object -> sclist -> circular-sclist -> assoc-list -> recursive-assoc-list -> ensemble Version: 1.0.0-beta2 Project: slippery chicken (algorithmic composition) Purpose: Implementation of the ensemble class. Author: Michael Edwards: m@michael-edwards.org Creation date: 4th September 2001 $$ Last modified: 12:28:40 Wed Apr 18 2012 BST SVN ID: $Id: ensemble.lsp 1982 2012-05-24 15:35:54Z medward2 $