Some extra programs to make using boar and boar-midi easier.
cc semicolons.c -o semicolons
mv semicolons /usr/local/bin
chmod +x delay.sh
mv delay.sh /usr/local/bin/delay
chicken-install srfi-1
chicken-csc boar-composer.scm
mv boar-composer /usr/local/bin
Input to boar programs is newline delimited, which can make specifying chords or multiple options a hassle. The semicolons command turns semicolons into newlines, so that a chord like
n60;n65;n69
is read as
n60
n65
n69
This functionality is effectively the same as tr, but I've found that its buffering behavior can gum up pipes. semicolons will flush after every command.
I am not sure if it's my old synthesizer, my old computer, or both, but rapid MIDI output is ignored unless I delay it slightly. Running delay n in a pipe will hold off on echoing its input for n seconds. n can be fractional. Using an imperceptibly small value of n seems to do the trick.
Takes a S-expression of form:
((steps n)
(notes (list (chord ...) ...)))
and generates a looped score of boar note on/off events suitable for use with pop.
Syntax available in notes:
- Individual MIDI notes
C0 .. Bb10. Sharps are not available due to the significance of#in Scheme. Just use flats. mjandmnchord functions for use against a single note. Alsomj7andmn7. Create more in the source code using these as templates.- An
arpfunction to break a chord into individual note events. You most likely want to flatten it with,@. - Rests can be represented with
∅or the normal empty list'(). - Arbitrary strings (for non-note patch control) can be inserted into a sublist.
For example:
echo '((steps 4) (notes (list (mj C5) (mn Db5) (mj F5) (mj G5))))' | boar-composer
Recommended for use with Vim. Select parts of your score and pipe them into this program.
Opening a repl that speaks to a synth on MIDI channel one, then playing a chord on it.
mkfifo synth
boar-midi 1 <> synth
rlwrap cat | semicolons | delay 0.001 > synth
n60;n65;n69
o60;o65;o69