Stephane Boussuge Posted May 24, 2016 Share Posted May 24, 2016 ;;; ------------------------------------------------------------------------------ ;;; GEN-PITCH-LINE ;;; Pitch generation function based on noise vectors conversion with a large choice of ;;; types of noises, compress ratio for the vector, filtering repetitions and ambitus. (defun gen-pitch-line (nb-pitch &key (compress 1) (ambitus '(c4 c6)) seed filter-repeat (type :white)) (do-verbose ("gen-pitch-line") (rnd-seed seed) (labels ((white (nb-pitch &key (compress 1) (ambitus '(c4 c6)) seed filter-repeat type) (if filter-repeat (gen-trim nb-pitch (filter-repeat filter-repeat (vector-to-pitch ambitus (vector-smooth compress (gen-white-noise nb-pitch :seed seed :type type))))) (vector-to-pitch ambitus (vector-smooth compress (gen-white-noise nb-pitch :seed seed :type type))))) (pink (nb-pitch &key (compress 1) (ambitus '(c4 c6)) seed filter-repeat) (if filter-repeat (gen-trim nb-pitch (filter-repeat filter-repeat (vector-to-pitch ambitus (vector-smooth compress (gen-pink-noise nb-pitch :seed seed))))) (vector-to-pitch ambitus (vector-smooth compress (gen-pink-noise nb-pitch :seed seed))))) ) (cond ((equal type ':white) (white nb-pitch :compress compress :ambitus ambitus :filter-repeat filter-repeat :seed (seed) :type :normal)) ((equal type ':binary) (white nb-pitch :compress compress :ambitus ambitus :filter-repeat filter-repeat :seed (seed) :type :binary)) ((equal type ':cauchy) (white nb-pitch :compress compress :ambitus ambitus :filter-repeat filter-repeat :seed (seed) :type :cauchy)) ((equal type ':chi-square-2) (white nb-pitch :compress compress :ambitus ambitus :filter-repeat filter-repeat :seed (seed) :type :chi-square-2)) ((equal type ':double-exponential) (white nb-pitch :compress compress :ambitus ambitus :filter-repeat filter-repeat :seed (seed) :type :double-exponential)) ((equal type ':exponential) (white nb-pitch :compress compress :ambitus ambitus :filter-repeat filter-repeat :seed (seed) :type :exponential)) ((equal type ':extreme) (white nb-pitch :compress compress :ambitus ambitus :filter-repeat filter-repeat :seed (seed) :type :extreme)) ((equal type ':gaussian) (white nb-pitch :compress compress :ambitus ambitus :filter-repeat filter-repeat :seed (seed) :type :gaussian)) ((equal type ':logistic) (white nb-pitch :compress compress :ambitus ambitus :filter-repeat filter-repeat :seed (seed) :type :logistic)) ((equal type ':lognormal) (white nb-pitch :compress compress :ambitus ambitus :filter-repeat filter-repeat :seed (seed) :type :lognormal)) ((equal type ':triangular) (white nb-pitch :compress compress :ambitus ambitus :filter-repeat filter-repeat :seed (seed) :type :triangular)) ((equal type ':low-pass) (white nb-pitch :compress compress :ambitus ambitus :filter-repeat filter-repeat :seed (seed) :type :low-pass)) ((equal type ':high-pass) (white nb-pitch :compress compress :ambitus ambitus :filter-repeat filter-repeat :seed (seed) :type :high-pass)) ((equal type ':pink) (pink nb-pitch :compress compress :ambitus ambitus :filter-repeat filter-repeat :seed (seed))))))) #| USAGE (gen-pitch-line 24 :compress 0.42 :type :white :filter-repeat 1) (gen-pitch-line 24 :compress 0.42 :type :pink :filter-repeat 1) (gen-pitch-line 24 :compress 0.42 :type :extreme :filter-repeat 1) (gen-eval 8 '(make-omn :pitch (gen-pitch-line 24 :compress 0.42 :type :white :filter-repeat 1) :length (euclidean-rhythm 16 1 16 's :type 2) ) :seed 33) |# ;;; ------------------------------------------------------------------------------ SB. opmo, AM and Rangarajan 3 Quote Link to comment Share on other sites More sharing options...
Rangarajan Posted May 24, 2016 Share Posted May 24, 2016 SB, Thanks. Useful function, I am sure. Thought I could re-write the function slightly differently, hope you don't mind: (defun gen-pitch-line2 (nb-pitch &key (compress 1) (ambitus '(c4 c6)) seed filter-repeat (type :white)) (let (pitches) (do-verbose ("gen-pitch-line2") (rnd-seed seed) (labels ((white-or-pink (nb-pitch seed type) (if (eq type ':pink) (gen-pink-noise nb-pitch :seed seed) (gen-white-noise nb-pitch :seed seed :type (if (eq type ':white) :normal type)))) (process (nb-pitch &key (compress 1) (ambitus '(c4 c6)) seed filter-repeat type) (setf pitches (vector-to-pitch ambitus (vector-smooth compress (white-or-pink nb-pitch seed type)))) (when filter-repeat (setf pitches (gen-trim nb-pitch (filter-repeat filter-repeat pitches)))) pitches) ) (process nb-pitch :compress compress :ambitus ambitus :filter-repeat filter-repeat :seed (seed) :type type))))) I hope I haven't messed up the logic! Regards, Rangarajan opmo 1 Quote Link to comment Share on other sites More sharing options...
Stephane Boussuge Posted May 24, 2016 Author Share Posted May 24, 2016 Thank you very much Rangarajan for your help. As you can see i am more musician than programmer ;-) Your version is more concise. SB. Quote Link to comment Share on other sites More sharing options...
Rangarajan Posted May 24, 2016 Share Posted May 24, 2016 I am the other way, so it helps to keep balance in the forum! -Rangarajan opmo 1 Quote Link to comment Share on other sites More sharing options...
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