/usr/share/snd/bess1.scm is in snd 18.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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;; Author: Michael Scholz <scholz-micha@gmx.de>
;; Created: Thu May 29 04:14:35 CEST 2003
;; Last: Sun Jun 15 03:50:21 CEST 2003
;; changed slightly 14-Jun-06 Bill to match bess.scm, fix pitch problem in make-oscil.
;; then again 18-Dec-09 to use s7 rather than Guile
;; changed float-vector-map! to use a loop instead (Bill 4-July-12)
(if (not (provided? 'snd-motif)) (error 'gui-error "bess1.scm needs motif"))
;;; Commentary:
;; This file provides simple mono real time output to DAC. Tempo,
;; frequency, amplitude, and FM index can be controlled via sliders.
;; The music algorithms are taken from clm-2/rt.lisp and
;; clm-2/bess5.cl.
;; (main) calls (rt-motif) which starts a Motif widget with two DAC
;; tests.
;;
;; (rt-motif :srate *clm-srate* ;; 22050
;; :bufsize *clm-rt-bufsize* ;; 128
;; :sample-type *clm-sample-type*) ;; mus-lshort
;;; Code:
(with-let *motif*
;(set! *clm-srate* 22050)
(define *clm-sample-type* mus-lfloat)
(define *clm-rt-bufsize* 1024)
(define *output* #f) ;holds fd from (mus-audio-open-output)
(define ctempo 0.25)
(define camp 1.0)
(define cfreq 1.0)
(define cindex 1.0)
(define cplay #f)
(define sliderback "lightsteelblue")
(define background "lightsteelblue1")
;(define (seconds->samples secs) (round (* secs *clm-srate*)))
;; called by XtAppAddWorkProc
(define (rt-send->dac func)
(if cplay
(let ((data (make-float-vector *clm-rt-bufsize*)))
(do ((i 0 (+ i 1)))
((= i *clm-rt-bufsize*))
(set! (data i) (func)))
(mus-audio-write *output* (copy data (make-float-vector (list 1 *clm-rt-bufsize*))) *clm-rt-bufsize*)
#f)
(begin
(mus-audio-close *output*)
#t)))
(define make-rt-violin
(let ((+documentation+ "(make-rt-violin dur freq amp (fm-index 1.0) (amp-env '(0 0 25 1 75 1 100 0))) real time simple violin (see fm.html)"))
(lambda* (dur freq amp (fm-index 1.0) (amp-env '(0 0 25 1 75 1 100 0)))
(let* ((frq-scl (hz->radians freq))
(maxdev (* frq-scl fm-index)))
(let ((carrier (make-oscil :frequency freq))
(fmosc1 (make-oscil :frequency freq))
(fmosc2 (make-oscil :frequency (* 3 freq)))
(fmosc3 (make-oscil :frequency (* 4 freq)))
(ampf (make-env :envelope amp-env :scaler amp :duration dur))
(indf1 (make-env :envelope '(0 1 25 0.4 75 0.6000000000000001 100 0)
:scaler (* maxdev (/ 5.0 (log freq)))
:duration dur))
(indf2 (make-env :envelope '(0 1 25 0.4 75 0.6000000000000001 100 0)
:scaler (/ (* maxdev 3.0 (- 8.5 (log freq))) (+ 3.0 (/ freq 1000)))
:duration dur))
(indf3 (make-env :envelope '(0 1 25 0.4 75 0.6000000000000001 100 0)
:scaler (* maxdev (/ 4.0 (sqrt freq)))
:duration dur))
(pervib (make-triangle-wave :frequency 5 :amplitude (* 0.0025 frq-scl)))
(ranvib (make-rand-interp :frequency 16 :amplitude (* 0.005 frq-scl))))
(lambda ()
(let ((vib (+ (triangle-wave pervib) (rand-interp ranvib))))
(* (env ampf)
(oscil carrier
(+ vib
(* (env indf1) (oscil fmosc1 vib))
(* (env indf2) (oscil fmosc2 (* 3.0 vib)))
(* (env indf3) (oscil fmosc3 (* 4.0 vib)))))))))))))
(define lim 256)
;; from clm-2/rt.lisp
(define* (make-float-vector-test (srate *clm-srate*)
(bufsize *clm-rt-bufsize*)
(sample-type *clm-sample-type*))
(let ((vpits (make-vector (+ 1 lim) 0))
(vbegs (make-vector (+ 1 lim) 0)))
(do ((i 0 (+ 1 i)))
((= i lim))
(set! (vpits i) (random 12))
(set! (vbegs i) (+ 1 (random 3))))
(set! *clm-srate* srate)
(set! *clm-rt-bufsize* bufsize)
(set! *output* (mus-audio-open-output mus-audio-default srate 1 sample-type (* bufsize 2)))
(let ((cellbeg 0)
(cellsiz 6)
(cellctr 0)
(func #f)
(len 0)
(dur 0.0)
(vmode (vector 0 12 2 4 14 4 5 5 0 7 7 11 11)))
(lambda ()
(if (> len 1)
(set! len (- len 1))
(begin
(set! dur (* ctempo (vbegs (+ cellctr 1))))
(set! cellctr (+ cellctr 1))
(if (> cellctr (+ cellsiz cellbeg))
(begin
(if (> (random 1.0) 0.5) (set! cellbeg (+ 1 cellbeg)))
(if (> (random 1.0) 0.5) (set! cellsiz (+ 1 cellsiz)))
(set! cellctr cellbeg)))
(let ((freq (* cfreq 16.351 16
(expt 2 (/ (vmode (vpits cellctr)) 12.0)))))
(format () "dur: ~A, freq: ~A, amp: ~A, index: ~A~%"
dur
(if (< (* 8 freq) *clm-srate*)
freq
(/ freq 4))
(* camp 0.3)
cindex)
(set! func (make-rt-violin dur
(if (< (* 8 freq) *clm-srate*)
freq
(/ freq 4))
(* camp 0.3) :fm-index cindex)))
(set! len (ceiling (/ (seconds->samples dur) bufsize)))))
func))))
;; from clm-2/bess5.cl and clm-2/clm-example.lisp
(define time 60)
(define mode (vector 0 0 2 4 11 11 5 6 7 9 2 0 0))
(define rats (vector 1.0 256/243 9/8 32/27 81/64 4/3 1024/729 3/2 128/81 27/16 16/9 243/128 2.0))
(define bell '(0 0 10 0.25 90 1.0 100 1.0))
(define pits (make-vector (+ 1 lim) 0))
(define octs (make-vector (+ 1 lim) 0))
(define rhys (make-vector (+ 1 lim) 0))
(define begs (make-vector (+ 1 lim) 0))
(define amps (make-vector (+ 1 lim) 0))
(define (tune x)
(* (rats (modulo x 12))
(expt 2 (floor (/ x 12)))))
(define (rbell x)
(envelope-interp (* x 100) bell))
(define* (make-agn (srate *clm-srate*)
(bufsize *clm-rt-bufsize*)
(sample-type *clm-sample-type*))
(do ((i 0 (+ i 1)))
((= i lim))
(set! (octs i) (floor (+ 4 (* 2 (rbell (random 1.0))))))
(set! (pits i) (mode (random 12)))
(set! (rhys i) (+ 4 (random 6)))
(set! (begs i) (if (< (random 1.0) 0.9)
(+ 4 (random 2))
(random 24)))
(set! (amps i) (floor (+ 1 (* 8 (rbell (random 1.0)))))))
(set! *clm-srate* srate)
(set! *clm-rt-bufsize* bufsize)
(set! *output* (mus-audio-open-output mus-audio-default srate 1 sample-type (* bufsize 2)))
(let ((wins (vector '(0 0 40 0.1 60 0.2 75 0.4 82 1 90 1 100 0)
'(0 0 60 0.1 80 0.2 90 0.4 95 1 100 0)
'(0 0 10 1 16 0 32 0.1 50 1 56 0 60 0 90 0.3 100 0)
'(0 0 30 1 56 0 60 0 90 0.3 100 0)
'(0 0 50 1 80 0.3 100 0)
'(0 0 40 0.1 60 0.2 75 0.4 82 1 90 1 100 0)
'(0 0 40 0.1 60 0.2 75 0.4 82 1 90 1 100 0)
'(0 0 10 1 32 0.1 50 1 90 0.3 100 0)
'(0 0 60 0.1 80 0.3 95 1 100 0)
'(0 0 80 0.1 90 1 100 0)))
(nextbeg 0.0)
(beg 0.0)
(dur 0.0)
(freq 0.0)
(ampl 0.0)
(ind 0.0)
(cellctr 0)
(cellsiz 4)
(cellbeg 0)
(whichway 1)
(func #f)
(len 0))
(lambda ()
(if (> len 1)
(set! len (- len 1))
(begin
(set! beg (+ beg nextbeg))
(set! nextbeg (+ nextbeg (max 0.025 (* ctempo (+ 0.95 (random 0.1)) (begs cellctr)))))
(set! dur (max 0.025 (* ctempo (+ 0.85 (random 0.1)) (rhys cellctr))))
(set! freq (* cfreq 16.351 (tune (pits cellctr)) (expt 2 (octs cellctr))))
(set! ampl (* camp 10 (max 0.003 (* (amps cellctr) 0.01))))
(set! ind (* cindex (random 3.0)))
(set! cellctr (+ cellctr 1))
(if (> cellctr (+ cellsiz cellbeg))
(begin
(set! cellbeg (+ 1 cellbeg))
(if (> (random 1.0) 0.5) (set! cellsiz (+ cellsiz whichway)))
(cond ((and (> cellsiz 10)
(> (random 1.0) 0.99))
(set! whichway -2))
((and (> cellsiz 6)
(> (random 1.0) 0.999))
(set! whichway -1))
((< cellsiz 4)
(set! whichway 1)))
(set! nextbeg (+ nextbeg (random 1.0)))
(set! cellctr cellbeg)))
(set! func (make-rt-violin dur freq ampl
:fm-index ind
:amp-env (wins (floor (* 10 (- beg (floor beg)))))))
(set! len (ceiling (/ (seconds->samples dur) bufsize)))))
func)))
#|
;; from env.scm
(define* (envelope-interp :rest args)
(let ((x (car args))
(env (cadr args))
(base (if (null? (cddr args)) #f (caddr args))))
(cond ((null? env) 0.0)
((or (<= x (car env))
(null? (cddr env)))
(cadr env))
((> (caddr env) x)
(if (or (= (cadr env) (cadddr env))
(and base (= base 0.0)))
(cadr env)
(if (or (not base) (= base 1.0))
(+ (cadr env)
(* (- x (car env))
(/ (- (cadddr env) (cadr env))
(- (caddr env) (car env)))))
(+ (cadr env)
(* (/ (- (cadddr env) (cadr env))
(- base 1.0))
(- (expt base (/ (- x (car env))
(- (caddr env) (car env))))
1.0))))))
(else (envelope-interp x (cddr env))))))
|#
(define* (rt-motif :rest args)
(let* ((shell-app (XtVaOpenApplication
"FM" 0 () applicationShellWidgetClass
(list XmNallowShellResize #t)))
(app (cadr shell-app))
(shell (car shell-app))
(dpy (XtDisplay shell))
(black (BlackPixelOfScreen (DefaultScreenOfDisplay dpy))))
(define (get-color color)
(let ((col (XColor))
(cmap (DefaultColormap dpy (DefaultScreen dpy))))
(if (= (XAllocNamedColor dpy cmap color col col) 0)
(error 'no-memory "can't allocate ~A" color)
(.pixel col))))
(XtSetValues shell (list XmNtitle "FM Forever!"))
(let* ((light-blue (get-color sliderback))
(form (XtCreateManagedWidget "form" xmFormWidgetClass shell
(list XmNbackground (get-color background)
XmNforeground black
XmNresizePolicy XmRESIZE_GROW)))
;; play
(play-button (XtCreateManagedWidget "play" xmToggleButtonWidgetClass form
(list XmNleftAttachment XmATTACH_FORM
XmNbottomAttachment XmATTACH_NONE
XmNtopAttachment XmATTACH_FORM
XmNrightAttachment XmATTACH_NONE
XmNbackground (get-color background))))
;; radio
(radio (XmCreateRadioBox form "radio"
(list XmNorientation XmHORIZONTAL
XmNleftAttachment XmATTACH_WIDGET
XmNleftWidget play-button
XmNbottomAttachment XmATTACH_NONE
XmNtopAttachment XmATTACH_FORM
XmNrightAttachment XmATTACH_NONE
XmNbackground (get-color background))))
;; play agn
(agn-button (XtCreateManagedWidget "agn" xmToggleButtonWidgetClass radio
(list XmNleftAttachment XmATTACH_FORM
XmNbottomAttachment XmATTACH_NONE
XmNtopAttachment XmATTACH_FORM
XmNrightAttachment XmATTACH_NONE
XmNbackground (get-color background))))
;; play test
(test-button (XtCreateManagedWidget "test" xmToggleButtonWidgetClass radio
(list XmNleftAttachment XmATTACH_WIDGET
XmNleftWidget agn-button
XmNbottomAttachment XmATTACH_NONE
XmNtopAttachment XmATTACH_FORM
XmNrightAttachment XmATTACH_NONE
XmNbackground (get-color background))))
;; quit
(quit-button (XtCreateManagedWidget " quit " xmPushButtonWidgetClass form
(list XmNleftAttachment XmATTACH_WIDGET
XmNleftWidget radio
XmNbottomAttachment XmATTACH_NONE
XmNtopAttachment XmATTACH_FORM
XmNrightAttachment XmATTACH_FORM
XmNbackground (get-color background))))
(tempo (let ((sep (XtCreateManagedWidget "sep" xmSeparatorWidgetClass form
(list XmNleftAttachment XmATTACH_FORM
XmNbottomAttachment XmATTACH_NONE
XmNtopAttachment XmATTACH_WIDGET
XmNtopWidget radio
XmNrightAttachment XmATTACH_FORM
XmNheight 4
XmNorientation XmHORIZONTAL))))
(XtCreateManagedWidget " tempo:" xmLabelWidgetClass form
(list XmNleftAttachment XmATTACH_FORM
XmNbottomAttachment XmATTACH_NONE
XmNtopAttachment XmATTACH_WIDGET
XmNtopWidget sep
XmNrightAttachment XmATTACH_NONE
XmNrecomputeSize #f
XmNbackground (get-color background)))))
(tempo-label (XtCreateManagedWidget "label" xmLabelWidgetClass form
(list XmNleftAttachment XmATTACH_WIDGET
XmNleftWidget tempo
XmNbottomAttachment XmATTACH_NONE
XmNtopAttachment XmATTACH_OPPOSITE_WIDGET
XmNtopWidget tempo
XmNrightAttachment XmATTACH_NONE
XmNbackground (get-color background))))
(tempo-scale (XtCreateManagedWidget "tempo" xmScaleWidgetClass form
(list XmNleftAttachment XmATTACH_WIDGET
XmNleftWidget tempo-label
XmNbottomAttachment XmATTACH_NONE
XmNtopAttachment XmATTACH_OPPOSITE_WIDGET
XmNtopWidget tempo-label
XmNrightAttachment XmATTACH_FORM
XmNshowValue #f
XmNorientation XmHORIZONTAL
XmNheight 20
XmNbackground light-blue)))
;; freq
(freq (XtCreateManagedWidget " freq:" xmLabelWidgetClass form
(list XmNleftAttachment XmATTACH_FORM
XmNbottomAttachment XmATTACH_NONE
XmNtopAttachment XmATTACH_WIDGET
XmNtopWidget tempo
XmNrightAttachment XmATTACH_NONE
XmNrecomputeSize #f
XmNbackground (get-color background))))
(freq-label (XtCreateManagedWidget "label" xmLabelWidgetClass form
(list XmNleftAttachment XmATTACH_WIDGET
XmNleftWidget freq
XmNbottomAttachment XmATTACH_NONE
XmNtopAttachment XmATTACH_OPPOSITE_WIDGET
XmNtopWidget freq
XmNrightAttachment XmATTACH_NONE
XmNbackground (get-color background))))
(freq-scale (XtCreateManagedWidget "freq" xmScaleWidgetClass form
(list XmNleftAttachment XmATTACH_WIDGET
XmNleftWidget freq-label
XmNbottomAttachment XmATTACH_NONE
XmNtopAttachment XmATTACH_OPPOSITE_WIDGET
XmNtopWidget freq-label
XmNrightAttachment XmATTACH_FORM
XmNshowValue #f
XmNorientation XmHORIZONTAL
XmNheight 20
XmNbackground light-blue)))
;; amp
(amp (XtCreateManagedWidget " amp:" xmLabelWidgetClass form
(list XmNleftAttachment XmATTACH_FORM
XmNbottomAttachment XmATTACH_NONE
XmNtopAttachment XmATTACH_WIDGET
XmNtopWidget freq
XmNrightAttachment XmATTACH_NONE
XmNrecomputeSize #f
XmNbackground (get-color background))))
(amp-label (XtCreateManagedWidget "label" xmLabelWidgetClass form
(list XmNleftAttachment XmATTACH_WIDGET
XmNleftWidget amp
XmNbottomAttachment XmATTACH_NONE
XmNtopAttachment XmATTACH_OPPOSITE_WIDGET
XmNtopWidget amp
XmNrightAttachment XmATTACH_NONE
XmNbackground (get-color background))))
(amp-scale (XtCreateManagedWidget "amp" xmScaleWidgetClass form
(list XmNleftAttachment XmATTACH_WIDGET
XmNleftWidget amp-label
XmNbottomAttachment XmATTACH_NONE
XmNtopAttachment XmATTACH_OPPOSITE_WIDGET
XmNtopWidget amp-label
XmNrightAttachment XmATTACH_FORM
XmNshowValue #f
XmNorientation XmHORIZONTAL
XmNheight 20
XmNbackground light-blue)))
(index-label (let ((index (XtCreateManagedWidget " index:" xmLabelWidgetClass form
(list XmNleftAttachment XmATTACH_FORM
XmNbottomAttachment XmATTACH_NONE
XmNtopAttachment XmATTACH_WIDGET
XmNtopWidget amp
XmNrightAttachment XmATTACH_NONE
XmNrecomputeSize #f
XmNbackground (get-color background)))))
(XtCreateManagedWidget "label" xmLabelWidgetClass form
(list XmNleftAttachment XmATTACH_WIDGET
XmNleftWidget index
XmNbottomAttachment XmATTACH_NONE
XmNtopAttachment XmATTACH_OPPOSITE_WIDGET
XmNtopWidget index
XmNrightAttachment XmATTACH_NONE
XmNbackground (get-color background)))))
(index-scale (XtCreateManagedWidget "index" xmScaleWidgetClass form
(list XmNleftAttachment XmATTACH_WIDGET
XmNleftWidget index-label
XmNbottomAttachment XmATTACH_NONE
XmNtopAttachment XmATTACH_OPPOSITE_WIDGET
XmNtopWidget index-label
XmNrightAttachment XmATTACH_FORM
XmNshowValue #f
XmNorientation XmHORIZONTAL
XmNheight 20
XmNbackground light-blue))))
(let ((low-tempo 0.05)
(high-tempo 0.5)
(low-freq 0.1)
(high-freq 4.0)
(high-index 2.0)
(which-play 0)
(proc #f)
(func #f)
(set-flabel
(lambda (label value)
(let ((s1 (XmStringCreate (format #f "~5,3F" value) XmFONTLIST_DEFAULT_TAG)))
(XtVaSetValues label (list XmNlabelString s1))
(XmStringFree s1)))))
(define (tempo-callback w c i)
(set! ctempo (+ low-tempo (* (.value i) (/ (- high-tempo low-tempo) 100.0))))
(set-flabel tempo-label ctempo))
(define (amp-callback w c i)
(let ((high-amp 1.0))
(set! camp (* (.value i) (/ high-amp 100.0))))
(set-flabel amp-label camp))
(define (freq-callback w c i)
(set! cfreq (+ low-freq (* (.value i) (/ (- high-freq low-freq) 100.0))))
(set-flabel freq-label cfreq))
(define (index-callback w c i)
(set! cindex (* (.value i) (/ high-index 100.0)))
(set-flabel index-label cindex))
(define (set-defaults)
(set! ctempo 0.25)
(set! camp 1.0)
(set! cfreq 1.0)
(set! cindex 1.0)
(set-flabel tempo-label ctempo)
(set-flabel amp-label camp)
(set-flabel freq-label cfreq)
(set-flabel index-label cindex)
(XmScaleSetValue tempo-scale (floor (* 100 (/ (- ctempo low-tempo) (- high-tempo low-tempo)))))
(XmScaleSetValue freq-scale (floor (* 100 (/ (- cfreq low-freq) (- high-freq low-freq)))))
(XmScaleSetValue amp-scale (floor (* 100 camp)))
(XmScaleSetValue index-scale (floor (* 100 (/ cindex high-index)))))
(XtManageChild radio)
;; add scale-change (drag and value-changed) callbacks
(XtAddCallback tempo-scale XmNdragCallback tempo-callback)
(XtAddCallback tempo-scale XmNvalueChangedCallback tempo-callback)
(XtAddCallback amp-scale XmNdragCallback amp-callback)
(XtAddCallback amp-scale XmNvalueChangedCallback amp-callback)
(XtAddCallback freq-scale XmNdragCallback freq-callback)
(XtAddCallback freq-scale XmNvalueChangedCallback freq-callback)
(XtAddCallback index-scale XmNdragCallback index-callback)
(XtAddCallback index-scale XmNvalueChangedCallback index-callback)
(XtAddCallback agn-button XmNvalueChangedCallback
(lambda (w c i)
(if (.set i)
(set! which-play 0))
(set! cplay #f)
(XmToggleButtonSetState play-button cplay #f)))
(XmToggleButtonSetState agn-button #t #f)
(XtAddCallback test-button XmNvalueChangedCallback
(lambda (w c i)
(if (.set i)
(set! which-play 1))
(set! cplay #f)
(XmToggleButtonSetState play-button cplay #f)))
(XtAddCallback quit-button XmNactivateCallback
(lambda (w c i)
(set! cplay #f)
(if proc (XtRemoveWorkProc proc))
(exit 0)))
(XtAddCallback play-button XmNvalueChangedCallback
(lambda (w c i)
(set! cplay (.set i))
(if cplay
(begin
(set-defaults)
(set! func (apply (if (= which-play 0) make-agn make-float-vector-test) (or args ())))
(set! proc (XtAppAddWorkProc app (lambda (c) (rt-send->dac func)))))
(if proc (XtRemoveWorkProc proc)))))
(XmToggleButtonSetState play-button cplay #f)
(set-defaults)
(XtRealizeWidget shell))
(XtAppMainLoop app))))
(rt-motif)
)
;; bess1.scm ends here
|