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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; leslie.cms
;;
;; Time varying delay-lines
;; ========================
;; Doppler shift for Leslie
;;
;; Based on:
;; Abel, Berners, Serafin, Smith J.O
;; "Doppler Simulation and the Leslie",
;; Proc. of DAFx-02, September, 2002
;;
;; Thanks to Patty Huang
;;
;;
;; Syntax: CLM-4, S7
;;
;;
;; juanig@ccrma
;;
;;
;; NOTES:
;; Get Leslie effect on a pulse-train waveshape. Try acceleration with the vel-envelope.
;; It can also be used to apply a Leslie effect to a soundfile. Just switch to the
;; 'make-readin', readin ug.
;;
;; First version: Sat 20 Mar 2004 11:22:47 AM PST
;; Last update: Wed 13 Nov 2019 04:13:30 PM PST
;;
;; HISTORY:
;; 06/20/2014 fixed delays and delay lines length
;; 09/10/2014 added reflection delay lines
;; 09/12/2014 added lowport baffle section
;; 09/18/2014 S7 .cms version
;; 11/13/2019 Fixed delay line lengths and added a two-pole for the baffle part.
;; Removed butterworth in exchange for a two-pole frequency shifting.
;;
;;
;;
(define sspeed 345.12) ;; Velocity of sound
(define twopi (* 2 pi))
(define oneturn (* pi 2))
;;
;;;
;;
(definstrument (rotates start dur freq
(speedsl 3.33) ;; Speed source listener mts/sec
(velenv '(0 1 100 1)) ;; Velocity envelope
(gain 0.35) ;; scales output
;; (onset 0.0) ;; onset duration (secs) in case of reading a soundfile
(rev-amount 0.025)) ;; very short reverb
(let* ((beg (seconds->samples start))
(sig (make-pulse-train :frequency freq))
;; (rdA (make-readin :file infile ;; just in case you want to read
;; :start (seconds->samples onset))) ;; a soundfile instead
;;;
(maxddelayl (if (= *clm-srate* 44100) (values 160)
(values 192)))
(startddelay (if (= *clm-srate* 44100) (values 48)
(values 52)))
(m2samp (/ *clm-srate* sspeed))
(vel-env (make-env velenv :duration (* dur 0.5)))
;;;
;;; Doppler delay lines
;;;
(dpdelays (make-vector 4))
(dshift (make-vector 4 startddelay))
;;
;;;
;;; Reflection path delay arrays
;;;
(refldelays (make-vector 4))
(reflectlen (make-vector 4))
(reflections (make-vector 4 0.0))
(hornout (make-vector 4 0.0))
;;
;; Lowpass (baffle) 'frequency shift' array
(fshift (make-vector 4))
(baffleout (make-vector 4))
;;
;;
(lpf (make-vector 4))
;;
;;
(growf0 0.0)
(growf1 0.0)
(growfa 0.0)
(growfb 0.0)
;;
(hornangvel 1.0)
(baffleangvel 1.0)
(hornangle 0.0)
(hornradius 0.18)
(baffleangle 0.0)
(baffleradius 0.19050)
;;
(xdev 0.0)
(ydev 0.0)
(cabinetlen 0.71)
(cabinetwid 0.52)
;;
(end (+ beg (seconds->samples dur)))
)
;;
;; Make delays
;;
(do ((i 0 (1+ i)))
((= i 4 ))
(set! (dpdelays i) (make-delay :size startddelay
:max-size maxddelayl
:type mus-interp-linear
))
(set! (refldelays i) (make-delay :size startddelay
:max-size (ceiling (* cabinetlen 2 m2samp))
)) )
;;
;; Make filters
;;
(do ((i 0 (1+ i)))
((= i 4 ))
(set! (lpf i) (make-two-pole :a0 0.304 :b1 0.62986 :b2 0.825))
)
;;
;;
;;;
;;; main loop
;;;
(do ((i beg (1+ i)))
((= i end ))
;;
(let ((sample (pulse-train sig))
;; (sample (readin rdA)) ;; switch in case of reading a soundfile
(deltavel (env vel-env))
(sigouta 0.0) (sigoutb 0.0) ;; horn
(sigoutc 0.0) (sigoutd 0.0) ;; reflections
(woofera 0.0) (wooferb 0.0)) ;; low baffle output
;;
;;; set acceleration of horn
;;
(set! hornangvel (* speedsl deltavel))
(set! hornangle (+ hornangle (* twopi (/ hornangvel *clm-srate*))))
;;
;;; set motion parameter for baffle lower port
;;
(set! baffleangvel (* 0.895 speedsl )) ;; 0.98
(set! baffleangle (+ baffleangle (* twopi (/ baffleangvel *clm-srate*))))
;;
(if (> hornangle twopi) (set! hornangle (- hornangle twopi)))
(if (> baffleangle twopi) (set! baffleangle (- baffleangle twopi)))
;;
;;; calculate grow functions for delay line size (horn Doppler shifts)
;;
(set! growf0 (/ (*(* (- twopi) hornradius) (* hornangvel (cos hornangle))) sspeed))
(set! growf1 (/ (*(* (- twopi) hornradius) (* hornangvel (sin hornangle))) sspeed))
;;
(set! (dshift 0) (- (dshift 0) growf0))
(set! (dshift 1) (- (dshift 1) growf1))
(set! (dshift 2) (- (dshift 2) (- growf0)))
(set! (dshift 3) (- (dshift 3) (- growf1)))
;;
(do ((j 0 (1+ j)))
((= j 4))
(set! (hornout j ) (delay (dpdelays j) sample (dshift j)))
)
;;
;;; Reflections
;;
(set! xdev (* hornradius (cos hornangle)))
(set! ydev (* hornradius (sin hornangle)))
(set! (reflectlen 0) (* (+ (/ cabinetwid 2) ydev) m2samp))
(set! (reflectlen 1) (* (- cabinetlen xdev) m2samp))
(set! (reflectlen 2) (* 1.5 (- cabinetwid ydev) m2samp))
(set! (reflectlen 3) (* (+ cabinetlen xdev) m2samp))
;;
;; Need to add these reflections to *reverb*
;;
(do ((j 0 (1+ j)))
((= j 4))
(set! (reflections j) (delay (refldelays j)
(hornout j)
(reflectlen j))))
;;
(set! sigouta (+ (hornout 0) (hornout 2)))
(set! sigoutb (+ (hornout 1) (hornout 3)))
(set! sigoutc (+ (reflections 0) (reflections 2)))
(set! sigoutd (+ (reflections 1) (reflections 3)))
;;
;;
;; Grow functions baffle low port section
(set! growfa (* (- twopi) baffleradius baffleangvel (cos baffleangle)))
(set! growfb (* (- twopi) baffleradius baffleangvel (sin baffleangle)))
;;
(set! (fshift 0) (+ 200 (* growfa 250)))
(set! (fshift 1) (+ 200 (* growfb 250)))
(set! (fshift 2) (+ 225 (* (- growfa) 250)))
(set! (fshift 3) (+ 225 (* (- growfb) 250)))
;;
;;; Filter for baffle low port section
;;
(do ((k 0 (1+ k)))
((= k 4))
(set! (mus-frequency (lpf k)) (fshift k))
(set! (mus-scaler (lpf k)) 0.938987)
)
;;
;;
(do ((k 0 (1+ k)))
((= k 4))
(set! (baffleout k) (two-pole (lpf k) sample))
)
;;
;;
(set! woofera (* 0.175 (+ (baffleout 0) (baffleout 2))))
(set! wooferb (* 0.175 (+ (baffleout 1) (baffleout 3))))
;;
;;
(outa i (* gain (+ sigouta sigoutc woofera)))
(outb i (* gain (+ sigoutb sigoutd wooferb)))
;;
;;; in case of reverb
;;
(if *reverb*
(progn
(outa i (* (* 0.5 gain) (+ sigouta woofera) rev-amount) *reverb*)
(outb i (* (* 0.5 gain) (+ sigoutb wooferb) rev-amount) *reverb*) ))
))
))
;;; (with-sound (:channels 2) (rotates 0 1 800))
;;; (with-sound (:channels 2) (rotates 0 3 200))
;;; (with-sound (:channels 2) (rotates 0 8 300 :speedsl 1.0))
;;; (with-sound (:channels 2) (rotates 0 3 500 :speedsl 1.0))
;;; (with-sound (:channels 2) (rotates 0 3 800 :velenv '(0 0.05 100 1)))
;;; (with-sound (:channels 2) (rotates 0 3 500 :velenv '(0 1 100 0.25)))
;;; (with-sound (:channels 2) (rotates 0 5 1000 :velenv '(0 0.25 50 1 100 0.3)))
;;; (load "nrev.ins")
;;; (with-sound (:channels 2 :reverb nrev :reverb-channels 2) (rotates 0 5 500 :velenv '(0 1 100 0.25)))
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