Morphological
Metrics and Morphological Mutation Functions
FAQ
Polansky
1/07/07
what
is this page about?
The morphological
metrics and mutation functions are
an on-going interest of mine for the past 25 years. The metrics compute
distances between morphologies. The mutations generate new morphologies
some distance away from another.
There's been a lot of
work done in this area by me,
my
students, friends, colleagues, etc. This page doesn't try to summarize
all of it (or keep up with what people are doing). Just a few
references
to get started.
The first talk I gave
on these was in 1980
("Morphological
Metrics"), which began the Mills Seminar in Formal Methods series. In
some
way, these notions have been related to much of what I've done over
the
past twenty-five years, but this page focusses on
specific
articles, pieces, references.
email
me
with questions if you like...
my
home page
a
selected list
of published
articles
about the functions
metrics
- 1996
"Morphological Metrics,"
Journal of
New Music
Research, 25(4):289?368, Swets & Zeitlinger Publishers, The
Netherlands.
[the long article] (email me for copies)
- 1992 "Possible
and Impossible Melody: Some
Formal
Aspects
of Contour," with Richard Bassein, Journal
of Music Theory, 36(2): 259 - 284.
[focused theoretical description of contour, foundational to the
contour
metrics]
- 1987
"Morphological Metrics: An Introduction to
a
Theory
of Formal Distances," Proceedings of
the ICMC, Urbana, pp. 197-205. [a
shorter presentation]
mutations
- "Spectral
Mutation in Soundhack," with Tom Erbe. 20th Anniversary Issue of
the Computer Music Journal.
20:1, pp. 92-101. Earlier version published in
Proceedings of the 5th Biennial Conference on Arts and Technology,
Connecticut
College, pp. 122-138. Short version published in the Proceedings of the
International Computer Music Conference (ICMC), Banff, pp.
107-110.
- "More on Morphological
Mutations: Recent
Techniques
and Developments," Proceedings of the ICMC, San Jose, pp. 57-60.
- 1991 "Morphological Mutation
Functions:
Applications to Motivic
Transformation and a New Class of Cross-Synthesis Techniques," with
Martin
McKinney, Proceedings of the ICMC,
Montreal, pp. 234-241.
published descriptions of pieces
using these ideas
- 1996, Bedhaya
Sadra/Bedhaya Guthrie, computer-composed score
for voices, gamelan, and instruments, Perspectives
of New Music, 34(1):28-55.
- 1996, No
Replacement (85 Verses for Kenneth Gaburo), computer-written
poem and accompanying theoretical notes, Perspectives of New Music,
Volume
33.
- 1994 "Live Interactive Computer
Music in HMSL,
1984-1992,"
with Nick Didkovsky, Computer Music
Journal, 18(2): 59-77.
- 1991"Live Interactive Intelligent
Computer
Music in
HMSL:
Notes on Pieces 1984-91," with Nick Didkovsky, Proceedings of the ICMC,
Montreal, pp. 37-44.
- Distance
Musics I-VI, works for
performer/programmers and
live interactive computer music systems in Perspectives of New Music,
25(1&2):
537-544.
a good description of HMSL
what kind of
software exists
for
this stuff?
- the
spectral mutation
functions have
been implemented (by tom erbe and I) in tom's soundhack. This has been
available for some time, and the software has been very
widely used.
- a
huge amount of
software,
with very
general and robust libraries, etc., implementing the stuff in the
articles
on mutations and metrics, existed in HMSL
(mainly what I've used to compose with). HMSL is written by Phil Burk,
me and David Rosenboom.
- other
people (Martin
McKinney's M.A
thesis at Dartmouth, Chris Langmead in his PAST, a number of others)
have
written software using these ideas in the spectral domain. check the dartmouth
m.a program website for links.
- Akira
Rabelais '
Argeïphontes Lyre program is a great piece of work that
implements
the mutation functions in the time domain
- Peter
Castine has
implemented
the mutation
functions, with some nifty additions and new ideas, in MSP, in a
package called litter.
The MSP object [lp.tim~] does time interval mutations and [lp.frim~]
does spectral mutations. There's also [lp.vim] that works at the Max
level.
- probably
the best
platform to
work
in for this kind of stuff now is Nick
Didkovsky and Phil Burk's JMSL, which is a wonderful implementation
of HMSL's philosophies in a very hip JAVA environment.
- speaking
of nick, check out
his combinatorial
contour applet, lots of fun
- one
of my ex- dartmouth
students,
kimo johnson, did some very interesting new theoretical and software
work with contour theory, and morphing in contour space.
pieces
- a
number of these pieces (51 Melodies,
Bedhaya..., Casten Variation, 3rd Anna study,
etc.) are on my CD called Change
from Artifact CDs, which is available from Frog
Peak Music.
A short list of some of
the
pieces that use the mutations and metrics very directly is:
Instrumental
[most of my scores are available
through frog peak music (a composers'
collective), but many scores and recordings are on this website as well]
- V'Leem'Shol (...and to rule...)
(Cantillation Study #2). Five flutes (with optional alto flute
doubling
"trope"). Second set of 17 verses of Torah, part of set of Cantillation
Studies. For Ann LaBerge and David Rosenboom, composed using FORTH/HMSL
compositional algorithms. Premiered by Ann LaBerge, Center for 21st
Century
Music Concert, Mills College, March, 1985; revised version, 1987, in
complex
just intonation. Recorded by Anne La Berge on Centaur CDCM CD, The
Virtuoso
in the Computer Age: II.
- The Casten Variation. 1993-4 Piano,
or piano and ensemble, HMSL-composed score. Premiered Mills College,
April,
1994 (piano version). Will appear, performed by Sarah Cahill, on my
next
Artifact CD, Change.
- Bedhaya Sadra/Bedhaya Guthrie.
1989;
1990. Voices, melody instruments, kemanak and gamelan accompaniment;
computer-composed
work based on tunes by Woody Guthrie and I Wayan Sadra. Uses HMSL
mutation
software. Commissioned and premiered by ASTRA Choir (John McCaughey,
conducting),
Melbourne, August, 1989. Revised version premiered NYC, Gamelan Son of
Lion, May, 1990. Revised score, 1992. Solo clarinet version, premiered
by Daniel Goode, August, 1992, Knitting Factory, NYC. Score published
in
Perspectives of New Music, 1995. Will appear (Dan Goode version, with
me
on gender), on my next Artifact CD, Change.
- Roads to Chimacum.
Mandolin
quartet
or string quartet. Computer-composed work. 17 variations on my
arrangement
of a fiddle tune by Patricia Spaeth. Uses HMSL mutation software.
Premiered
May, 1993, Modern Mandolin Quartet; and string quartet version, March,
1994, Zurich.
- Two Children’s Songs.
Tuba
and trombone,
two tubas, two bassoons, or any two bass wind instruments.
Computer-composed
work. Uses HMSL mutation software. Premiered May, 1992, Dartmouth.
- 51 Melodies (Pride holds
the
multitudes
in a continual, habitual process of readornment).
Computer-composed
work
for two electric guitars and optional rhythm section, or any two melody
instruments. Uses HMSL mutation software. Premiered, December, 1991,
Experimental
Intermedia Foundation, NYC. Will appear, performed by Nick Didkovsky
and
I on guitars, Leo Ciesa on drums, and Greg Anderson on bass, on my
Artifact CD, Change.
live electronic
- Distance Music. Set of
pieces
for any
number of performer/programmers using live microcomputer systems.
Several
have been performed, including Distance Music I ("The Metric System")
(for
Charles Ames), Distance Music IV ("Drawing Unnecessary
Conclusions"),"Distance
Music V ("The Roots of Learning") (for John Bischoff, Tim Perkis and
Jim
Horton), and Distance Music VI ("The World's Longest Melody") (for
David
Feldman). Published in Perspectives
of New Music.
- 17 Simple Melodies of the
Same Length
(for Dan Goode). 1987-8. Clarinet (or any melody instrument) and
live
interactive
intelligent computer. Written in HMSL (portable live computer music
piece).
Premiered in NYC by Dan Goode, in Seattle by William Smith, in San
Francisco
by George Brooks, in Toronto by John Oswald, in Europe by Ann LaBerge;
on cassette from Frog Peak Music. This piece is described in the CMJ
article
on my live HMSL pieces.
- Three Studies (for
performers
and live
computer): 1. Rhythm, 2. Melody, 3. Harmony. Premiered by the
Downtown
Ensemble, NYC., May, 1990. Also performed at Telluride
Composer-to-Composer
and Darmstadt Festival (July,1990). Software distributed by Frog Peak
Music.
This piece is described in the CMJ article on my live HMSL pieces.
tape pieces
- Frog Peak Collaboration
Pieces. 14
1 minute tape works based on a text/reading by Chris Mann. Most of
these
on Frog Peak Colalborations CD.
The ones that use the mutation
functions
are:
- Study: baa baa birthday
have
you any
star. August. Tape. Computer-synthesized work using Soundhack
spectral
mutations. On Computer Music Journal
20th Anniversary Issue CD. One of
the Three Anna Studies.