georgejwright

;; freaky_setup.xtm

;; A setup for driving the Arturia MicroFreak from extempore running on a computer.
;; Instructions for connecting the computer to the MicroFreak synth via a USB are covered in
;; the MicroFreak Manual page 21 and following.

;; Author: George Wright
;; Based on Ben Smith https://github.com/digego/extempore/blob/master/examples/external/portmidi-output.xtm

;; Keywords: extempore MicroFreak midi

georgejwright

;; extempore-2-MicroFreak.xtm

;; An introduction to driving the Arturia MicroFreak from extempore running on a computer.
;; Instructions for connecting the computer to the MicroFreak synth via a USB are covered in
;; the MicroFreak Manual page 21 and following.

;; For details of extempore see https://extemporelang.github.io/docs/overview/quickstart/

;; Author: George Wright
;; Based on Ben Smith https://github.com/digego/extempore/blob/master/examples/external/portmidi-output.xtm

georgejwright

;; An example of random notes from different instruments scheduled to be played at different times.

;; George Wright 22/01/2024

;; load the instruments file
(sys:load "libs/core/instruments.xtm")
(sys:load "libs/external/instruments_ext.xtm")
(sys:load "libs/core/pattern-language.xtm")
; (*metro* 'set-tempo 40)
(make-instrument piano sampler)

georgejwright

;; callback_nodes.xtm
;; Following Andrew Sorensen's
;; A Short Solo Piano Example - aa-cell
;; see: http://impromptu.moso.com.au/icmc-examples.html ;; this link no longer works!!
;; also see section: 3.5.3.Temporal graphs in:
;; https://www.researchgate.net/profile/Andrew-Sorensen-2/publication/228344047_aa-cell_in_practice_An_approach_to_musical_live_coding/links/543fa1120cf27832ae8bab97/aa-cell-in-practice-An-approach-to-musical-live-coding.pdf

;; For other relevant Sorensen links see end of this file:

;; The original "A Short Solo Piano Example" was written in 'impromptu'

georgejwright

;; playing_real_midi_extempore.xtm
;; George Wright 10/04/2023

;; I did some experimenting in pattern language playing vectors of pairs of real midi
;; notes which differ by small amounts. Like this for example:
; (:> test1 4 0 (play samp1 @1 80 dur) '(#(63.5 64.5) #(61.5 62.5) #(59.5 60.5)))
;; Rather than manually change '(64 62 60) into '(#(63.5 64.5) #(61.5 62.5) #(59.5 60.5))
;; I wanted to be able to do it on the fly.
;; I had to learn quite a lot about deep recursion in Scheme!
;; And I had to learn something about currying in scheme!

georgejwright

;; Learning about currying.
;; George Wright 07/04/2023

;; Trying to learn something about currying in Scheme.
;; Following this tutorial by "Logic Lambda":
;; https://www.youtube.com/watch?v=kOT44AC-x7s
;; Logic Lambda Scheme Racket
;; https://www.youtube.com/playlist?list=PLm8dSOaqLPHKVPwBkk9UeAB2Lokl1xMJM
;; Tutorial uses Racket scheme but here I use Scheme in the extempore setup
;; which is close to R5RS

georgejwright

;; In Jan 2023 I discussed with Ben and Minoru the possibility of using
;; non-integer midi numbers in extempore.
;; see: https://groups.google.com/g/extemporelang/c/1Ne2dHIXLW4/m/RKw4HL_sAgAJ
;; The first thing I discovered was that standard vanilla extempore scheme functions
;; play and play-note work fine with non-integer midi notes.
;; We then found quantizing and related functions from "libs/core/pc_ivl.xtm"
;; have been deliberately constructed to handle only integer midi numbers
;; and integer pc sets.
;;
;; We generated a new library file which, in my system, I have placed in the

georgejwright

;;; gpc_ivl.xtm -- pitch class and interval sets for real midi numbers

;; Adapted from the original work of Andrew Sorensen
;; by Minoru and George Wright
;; https://github.com/digego/extempore/blob/accbe7e0abb13567ecdcc25ccf9a54c92b0eb8c9/libs/core/pc_ivl.xtm
;; Keywords: extempore real midi

;;; Commentary:
;; In the original libs/core/pc_ivl.xtm library
;; a pitch class is taken to be a list of integer MIDI note values

georgejwright

;; Experiments with extempore synths.
;; George Wright 21/08/2022, 04/10/2022

;; An introduction to the sharedsystem synths of extempore.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;; While hunting for ideas about synths I came across an excellent series by "Chalk Walk" explaining
;; signal flow in several different hardware synths. Highly recommended.
;; https://www.youtube.com/playlist?list=PLuh4CHo4ShJeyS7uawkbOtbDTqCpF0REC
;; I had no experience with modular synths and I found the "Chalk Walk" videos very helpful.

georgejwright

; fourPartHamonies.xtm
; Four-voiced harmony chord progressions
; George Wright 29/06/2020

; Following Jake Lizzio and his "Voice Leading" video
; https://www.youtube.com/watch?v=UkatcvIuF4U;
; Just using the Extempore built-in salamander-piano samples

(sys:load "libs/core/pc_ivl.xtm")
(sys:load "libs/external/instruments_ext.xtm")