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190 lines
6.7 KiB
Common Lisp
190 lines
6.7 KiB
Common Lisp
;; stk.lsp -- STK-based instruments
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;;
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;; currently clarinet and saxophony are implemented
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(defun instr-parameter (parm)
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;; coerce parameter into a *sound-srate* signal
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(cond ((numberp parm)
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(stretch 30 (control-srate-abs *sound-srate* (const (float parm)))))
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(t
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(force-srate *sound-srate* parm))))
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(defun clarinet (step breath-env)
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(snd-clarinet (step-to-hz step) (force-srate *sound-srate* breath-env) *sound-srate*))
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(defun clarinet-freq (step breath-env freq-env)
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;; note that the parameters are in a different order -- I defined
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;; clarinet-freq this way so that the first two parameters are always
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;; step and breath. I didn't redo snd-clarinet-freq.
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(snd-clarinet_freq (step-to-hz step)
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(instr-parameter breath-env)
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(instr-parameter freq-env)
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*sound-srate*))
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(defun clarinet-all (step breath-env freq-env vibrato-freq vibrato-gain reed-stiffness noise)
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;; note that the parameters are not in the same order as snd-clarinet-all
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(setf breath-env (instr-parameter breath-env))
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(setf freq-env (instr-parameter freq-env))
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(setf reed-stiffness (instr-parameter reed-stiffness))
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(setf noise (instr-parameter noise))
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(snd-clarinet_all (step-to-hz step)
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breath-env freq-env
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;; STK scales 1.0 to 12Hz. Scale here so vibrato-freq is in Hz
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(/ vibrato-freq 12.0) vibrato-gain
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reed-stiffness noise
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*sound-srate*))
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(defun sax (step breath-env)
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(snd-sax (step-to-hz step) (force-srate *sound-srate* breath-env) *sound-srate*))
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(defun sax-freq (step breath-env freq-env)
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(snd-sax_freq (step-to-hz step)
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(instr-parameter breath-env)
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(instr-parameter freq-env)
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*sound-srate*))
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(defun sax-all (step breath-env freq-env vibrato-freq vibrato-gain reed-stiffness noise blow-pos reed-table-offset)
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(snd-sax_all (step-to-hz step)
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(instr-parameter freq-env)
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(instr-parameter breath-env)
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(instr-parameter (/ vibrato-freq 12.0))
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(instr-parameter vibrato-gain)
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(instr-parameter reed-stiffness)
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(instr-parameter noise)
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(instr-parameter blow-pos)
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(instr-parameter reed-table-offset)
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*sound-srate*)
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)
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; instr-parameter already defined in stk.lsp
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(defun flute (step breath-env)
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(snd-flute (step-to-hz step) (force-srate *sound-srate* breath-env) *sound-srate*))
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(defun flute-freq (step breath-env freq-env)
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(snd-flute_freq (step-to-hz step)
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(instr-parameter breath-env)
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(instr-parameter freq-env)
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*sound-srate*))
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(defun flute-all (step breath-env freq-env vibrato-freq vibrato-gain jet-delay noise)
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;; note that the parameters are not in the same order as snd-clarinet-all
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(setf breath-env (instr-parameter breath-env))
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(setf freq-env (instr-parameter freq-env))
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(setf jet-delay (instr-parameter jet-delay))
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(setf noise (instr-parameter noise))
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(snd-flute_all (step-to-hz step)
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breath-env freq-env
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;; STK scales 1.0 to 12Hz. Scale here so vibrato-freq is in Hz
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(/ vibrato-freq 12.0) vibrato-gain
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jet-delay noise
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*sound-srate*))
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(defun bowed (step bowpress-env)
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(snd-bowed (step-to-hz step) (force-srate *sound-srate* bowpress-env) *sound-srate*))
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(defun bowed-freq (step bowpress-env freq-env)
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(snd-bowed_freq (step-to-hz step)
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(instr-parameter bowpress-env)
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(instr-parameter freq-env)
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*sound-srate*))
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(defun mandolin (step dur &optional (detune 4.0))
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(let ((d (get-duration dur)))
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(snd-mandolin *rslt* (step-to-hz step) d 1.0 detune *sound-srate*)))
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(defun wg-uniform-bar (step bowpress-env)
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(snd-bandedwg (step-to-hz step) (force-srate *sound-srate* bowpress-env) 0 *sound-srate*))
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(defun wg-tuned-bar (step bowpress-env)
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(snd-bandedwg (step-to-hz step) (force-srate *sound-srate* bowpress-env) 1 *sound-srate*))
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(defun wg-glass-harm (step bowpress-env)
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(snd-bandedwg (step-to-hz step) (force-srate *sound-srate* bowpress-env) 2 *sound-srate*))
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(defun wg-tibetan-bowl (step bowpress-env)
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(snd-bandedwg (step-to-hz step) (force-srate *sound-srate* bowpress-env) 3 *sound-srate*))
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(defun modalbar (preset step duration)
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(let ((preset (case preset
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(MARIMBA 0)
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(VIBRAPHONE 1)
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(AGOGO 2)
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(WOOD1 3)
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(RESO 4)
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(WOOD2 5)
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(BEATS 6)
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(TWO-FIXED 7)
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(CLUMP 8)
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(t (error (format nil "Unknown preset for modalbar %A" preset)))))
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(d (get-duration duration)))
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(snd-modalbar *rslt* (step-to-hz step) preset d *sound-srate*)))
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(defun sitar (step dur)
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(let ((d (get-duration dur)))
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(snd-sitar *rslt* (step-to-hz step) d *sound-srate*)))
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(defun nyq:nrev (snd rev-time mix)
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(snd-stkrev 0 snd rev-time mix *sound-srate*))
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(defun nyq:jcrev (snd rev-time mix)
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(snd-stkrev 1 snd rev-time mix *sound-srate*))
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(defun nyq:prcrev (snd rev-time mix)
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(snd-stkrev 2 snd rev-time mix *sound-srate*))
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(defun nrev (snd rev-time mix)
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(multichan-expand #'nyq:nrev snd rev-time mix))
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(defun jcrev (snd rev-time mix)
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(multichan-expand #'nyq:jcrev snd rev-time mix))
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(defun prcrev (snd rev-time mix)
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(multichan-expand #'nyq:prcrev snd rev-time mix))
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(defun nyq:chorus (snd depth freq mix &optional (base-delay 6000))
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(snd-stkchorus snd base-delay depth freq mix *sound-srate*))
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(defun stkchorus (snd depth freq mix &optional (base-delay 6000))
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(multichan-expand #'nyq:chorus snd depth freq mix base-delay))
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(defun nyq:pitshift (snd shift mix)
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(snd-stkpitshift snd shift mix *sound-srate*))
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(defun pitshift (snd shift mix)
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(multichan-expand #'nyq:pitshift snd shift mix))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; HELPER FUNCTIONS
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; pass in rates of increase/decrease in begin/end... this is like noteOn and noteOff
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;
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; STK uses setRate but the actual ramp time is also a function of the sample rate.
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; I will assume the clarinet was run at 44100Hz and fix things so that the envelope
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; is sample-rate independent.
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;
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; STK seemed to always give a very fast release, so I changed the numbers so that
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; note-off values from 0.01 to 1 give an interesting range of articulations.
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;
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; IMPORTANT: the returned envelope is 0.1s longer than dur. There is 0.1s of silence
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; at the end so that the clarinet can "ring" after the driving force is removed.
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;
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(defun stk-breath-env (dur note-on note-off)
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(let* ((target (+ 0.55 (* 0.3 note-on)))
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(on-time (/ (* target 0.0045) note-on))
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(off-time (/ (* target 0.02) note-off)))
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;(display "clarinet-breath-env" target on-time off-time)
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(pwl on-time target
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(- dur off-time) target
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dur 0 (+ dur 0.1))))
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