COMMAND
diss -- calculate the degree of sensory dissonance for successive spectra
SYNOPSIS
diss [inputfile.spt ...] [> outputfile.dis]
DESCRIPTION
The diss command measures the degree of sensory
dissonance for successive acoustic moments.
It outputs a single
**diss
spine containing numerical values -- where higher
values indicate greater amounts of sensory dissonance.
The input must consist of one or more
**spect
spines.
Each data record in the
**spect
input represents a concurrent set of discrete
frequencies (spectrum).
Spectral data consist of sets of paired frequency/amplitude
values for each pure tone component present.
Typical musical sonorities contain dozens of spectral components.
The
diss
command implements an algorithm arising from the work of
Kameoka and Kuriyagawa (see REFERENCES.)
Sensory dissonance
is a low-level auditory phenomenon that is considered distinct from
culturally-mediated and contextual experiences of consonance or
dissonance (Greenwood, 1961; Plomp and Levelt, 1965).
It is therefore inappropriate to equate sensory dissonance with
"musical dissonance" broadly construed.
Sensory dissonance values are known to be influenced by the loudness,
overall pitch-height, interval-relationship,
and timbre of any participating tones.
For a description of the input
**spect
representation, refer to Section 2
(Representation Reference)
of this reference manual.
The output file format is dubbed `.dis'
OPTIONS
The
diss
command provides only a help option:
| -h | displays a help screen summarizing the command syntax |
Options are specified in the command line.
The
-k
option pertains to **kern inputs only.
This option adds **kern-related information to the output.
EXAMPLES
The following example illustrates an input and a corresponding output from the
diss
command.
The first and second spines
(**spect)
encode a simple input spectrum consisting of six pure tone components.
The first component has a frequency of 261 Hz at a sound pressure
level of 47 decibels.
The six components represent the pitches C4 and E4 played with 3 harmonics each.
The third spine
(**diss)
displays the corresponding sensory dissonance value as calculated by
diss.
An output value of about 65 is typical for a single pure tone
at about 60 dB SPL.
An output value near zero results for silence.
| **spect | **spect | **diss |
| 261;47 523;57 785;35 | 330;57 659;35 989;27 | 173 |
| *- | *- | *- |
PORTABILITY
DOS 2.0 and up, with the MKS Toolkit.
OS/2 with the MKS Toolkit.
UNIX systems supporting the
Korn
shell or
Bourne
shell command interpreters, and revised
awk
(1985).
SEE ALSO
**diss,
hint,
**spect,
spect
REFERENCES
Kameoka, A. & Kuriyagawa, M.
"Consonance theory, part I: Consonance of dyads."
Journal of the Acoustical Society of America,
Vol. 45, No. 6 (1969a) pp.1451-1459.
Kameoka, A. & Kuriyagawa, M.
"Consonance theory, part II: Consonance of complex tones
and its calculation method."
Journal of the Acoustical Society of America,
Vol. 45, No. 6 (1969b) pp.1460-1469.
