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**melac -- melodic accent representation
DESCRIPTION
The **melac representation is used to characterize the degree of pitch-related stress (melodic accent) for successive moments. Three types of tokens are recognized by **melac: stress-tokens, rests, and barlines. Stress-tokens encode decimal values ranging between 0 (no stress) and 1 (maximum stress).Barlines are represented using the "common system" for barlines -- see barlines.
FILE TYPE
It is recommended that files containing predominantly **melac
data should be given names with the distinguishing `.mac' extension.
SIGNIFIERS
The following table summarizes the **melac mappings of signifiers and signifieds.
0-9 melodic accent values specified as integer or real value; measure numbers r rest = barline; == double barline =; barline with pause sign Summary of **melac Signifiers
The following sample document shows a single spine of **melac data for the bass line of J. S. Bach's two-part keyboard Invention No. 1. The corresponding **kern and **semits representations are also shown:Notice that melodic accent values can be either real or integer values. Rests are represented by the single letter `r'.
!! J.S. Bach, Two-part Invention 1 (BWV 772) **kern **semits **melac *C: *C: *C: *M4/4 *M4/4 *M4/4 =1 =1 =1 2r r r 16r r r 16C -12 1 16D -10 0.33 16E -8 0.221 16F -7 0.556 16D -10 0.121 16E -8 0.241 16C -12 0.121 =2 =2 =2 8G -5 0.241 8GG -17 0.17 4r r r 16r r r 16G -5 1 16A -3 0.33 16B -1 0.221 16c 0 0.556 16A -3 0.121 16B -1 0.241 16G -5 0.121 =3 =3 =3 *- *- *-
PERTINENT COMMANDS
The following Humdrum command produces **melac data as output:
melac calculate melodic accent values for successive pitches
The following tandem interpretations can be used in conjunction with **melac:
meter signatures *M6/8key signatures *k[f#c#]key *c#:Tandem interpretations for **melac
barlines,
melac,
**semits,
semits