Triads
Usage
triads key [file]
Input Roman numerals should be separated by a newline or spaces.
Major key to standard output.
$ echo "I V vii I" | triads C Generating triads from standard input in the key of C Major. I: C E G V: G B D vii: B D F I: C E G
Minor key with a flat in the name.
echo "i iv V i" | triads Bbm Generating triads from standard input in the key of B♭ minor. i: B♭ D♭ F iv: E♭ G♭ B♭ V: F A C i: B♭ D♭ F
Outputting to a file, key modulation, and improper input.
triads E > triads.txt
Generating triads from standard input in the key of E Major.
I IV V I
V/V V/I V/ii V/vii V/V
i
debugger invoked on a CHARJE.TRIADS::CHORD-ERROR in thread
#<THREAD "main thread" RUNNING {1002F20003}>:
i is not a valid chord of E Major.
Type HELP for debugger help, or (SB-EXT:EXIT) to exit from SBCL.
restarts (invokable by number or by possibly-abbreviated name):
0: [USE-NEW-ROMAN] Enter a new roman numeral.
1: [ABORT ] Exit from the current thread.
((:METHOD CHARJE.TRIADS::ROMAN-TO-TRIAD (CHARJE.TRIADS::MAJOR-KEY T)) E Major "i") [fast-method]
source: (ERROR 'CHORD-ERROR :BAD-CHORD ROMAN :KEY OBJ)
0] 0
New roman numeral: I
vii V I
^D
Output file is clean of any mistakes.
cat triads.txt I: E G♯ B IV: A C♯ E V: B D♯ F♯ I: E G♯ B V/V: F♯ A♯ C♯ V/I: B D♯ F♯ V/ii: C♯ E G♯ V/vii: A♯ C♯ E V/V: F♯ A♯ C♯ I: E G♯ B vii: D♯ F♯ A V: B D♯ F♯ I: E G♯ B
Building
make dependencies available first
sbcl --no-userinit \
--eval "(require :asdf)" \
--eval "(require :charje.triads \"$(pwd)/charje.triads.asd\")" \
--eval "(asdf:make :charje.triads)"Installing
triads is currently available from Guix ‘R Us.