Paraphony

Paraphony is a term which has three distinct meanings in the field of music.

In musical theory

Paraphony is a term used in musical vernacular to refer to consonances which rely upon intervals of fifths and fourths. This terminology can be traced to ancient Greece and sources such as Theon of Smyrna.

In electronic music

Completely unrelated to the above sense, a synthesizer is called paraphonic if it can play multiple pitches at once, but those pitches share part of their electronic signal paths. For example, the Roland RS-202 string machine could play several dozen pitches at once, but only with a single shared volume envelope, requiring the collective chord to swell and diminish as a single cohesive whole. Similarly, the Korg Poly-800 had 8 oscillators and could produce 8 voices, but had just one filter circuit shared by all of them. Other examples include the Roland VP-330 vocoder and the Moog Sub 37.

Demonstration

Non-paraphonic polyphony

The following example simulates how we would expect a non-paraphonic polyphonic synthesizer (i.e. one with an individual EG for each voice) to behave when multiple overlapping notes are played without being released. (In this case, C, F# then B).

Note how previously-played (but still held down) notes remain "in the background" when subsequent notes are hit. This is broadly similar to the behaviour we would expect if the same thing were played on (e.g.) a piano.

Paraphonic synthesizer

The above can be contrasted with the following recording of how one paraphonic synthesizer (a Korg Volca Keys) actually handles the same situation in real life.

The first note (C) briefly peaks at a high volume ("Attack") when hit, then fades to a quieter level ("Sustain") as the key remains held down (in accordance with ADSR settings).

When the second note (F#) is played, it similarly comes in at full attack volume. However, due to the envelope generator being shared with the voice playing the (still held-down) C, it is forced to do the same. The 'C' returns to full volume simultaneously, giving the false impression it had been hit again.

When the third note (B) is played, a similar situation occurs. The previously-held C and F# return to full "attack" volume alongside, giving the false impression all three notes were hit simultaneously in a chord-like manner.

(While this demonstrates how the Volca Keys chooses to handle paraphony, other methods for doing so are also possible).

=Paraphony in electronic music - history, reinterpretation and generalisation of the term=

Introduction by Roland Corporation

Completely unrelated to paraphony in its traditional, musical-consonance sense is the commercial sales term coined by Roland Corporation for their GR-500 "Paraphonic Guitar Synthesizer" released in 1977 (continued in 1978 with the Roland RS-505 "Paraphonic String Synthesizer"). Here, Roland were drawing attention to the ability of the synthesizer to produce distinct sounds 'in parallel', whereby each note played can produce multiple complete tuned sounds simultaneously. Th
GR-500's instruction-manual
introduced the term to customers, as follows:
"The five separate sections... are the Guitar, Polyensemble, Bass, Solo Melody, and External Synthesizer Section... Each of the five sections may be played individually or in any combination... Roland has created a name for this new level of performance capability. It is the word "paraphonic," derived from "parallel" plus "phonic."

RolandCorp US wrote, i

"It is Roland's new GR-500 Guitar Synthesizer...both paraphonic and polyphonic. Polyphonic because full chords can be synthesized. Paraphonic because all five sections may be played at once."

Reinterpretation of Roland's marketing term for the new millenium

This does not explain how that 'new (commercial) meaning' of "paraphony" that in the context of electronic music instruments in 1977 has been turned around significantly into the 21st century from ''multiple complete polyphonic and monophonic sounds that can be layered in unison'' to a modern reinterpretation that focuses only on ''the ability of an electronic musical instrument to generate more than one note-frequency but with the inability to offer individual articulation of tone and/or loudness to each of the individual overlapping notes''.

The root of this misconception has been anecdotally attributed "I believe it was Gordon Reid in an SOS article that got it wrong... Roland's definition makes more sense. After all they created the word." to probably the Sound on Sound ("SOS") magazine article,
Introducing Polyphony
(part of its "Synth Secrets" series of articles) published for December, 2000. In this article, musician-writer Gordon Reid (''seemingly'' incorrectly) identifies paraphony thus:
"...a form of sound generation called 'Paraphonic' synthesis, prevalent in the late '70s and early '80s... why isn't 'paraphony' (if there is such a word) the same as polyphony? The answer to this is obvious if we consider the articulation of individual notes played on the instrument...", which Reid illustrates with a diagram of a synthesiser with polyphonic initial sound-generation (a divide-down multiple-oscillator and multiple-amplifier architecture) that is, in turn, fed through a single filter and secondary amplifier arrangement.

The main effect of the architecture is summarised i
the following month's continuation of the "Synth Secrets" series
with a quick reminder of the content of the previous month's Synth Secrets. Figure 1 (above) shows the architecture of a 'divide-down' paraphonic synth on which only the first note played benefits fully from the Attack and Decay stages of the contour generator, and only the last note benefits from the Release.". "the architecture of a 'divide-down' paraphonic synth on which only the first note played benefits fully from the Attack and Decay stages of the contour generator, and only the last note benefits from the Release." (SOS, January 2001)

This is a significantly different (re)interpretation of Roland's 'parallel sound' paraphonic term where, instead of being the positive description of multiple simultaneous sounds from a single input, it has turned around to be a somewhat negative description of instruments that cannot 'fully articulate' their polyphony, where each note shares a significant part of its sound creation (or its contouring) process with any and all other overlapping notes.

In fact, Reid was quite correct in what he described, in that instruments described by Roland as offering this 'parallel sound' paraphonic ability had offered layered combinations of sounds comprising individual sounds and voice-architectures that did indeed conform to his description. The articles do, however, seem to apply the term to any electronic musical instrument with this 'single route' voice architecture limitation, as opposed to - as Roland may contend - the actual stacking of different sounds into one, multi-composite sound. Interestingly, this recent 'redefinition' has become the prevailing popular meaning of "paraphonic" or "paraphony" in modern music technology terms.

Confusion reigns!

Due to reinterpretations or misinterpretations of what paraphony may actually mean, many musicians (and some instrument-manufacturers) have remained with or returned to using such terms as duophonic and polyphonic to describe their two-note (such as modern reiterations of ARP's Oddyssey) or multi-note instruments (such as Behringer's Poly D) - regardless of the multiplicity of any sound-architecture that follows oscillators or the like - simply for a more-meaningful and more-descriptive, terse description of the instrument's note-generation capability and irrespective of the separation (or not) of tone and/or volume, per-note. Meanwhile, the term, 'paraphony' is seldom (or never) applied to the instrument architecture for which Roland spawned the term, which would now, in more-modern parlance, include any 'multitimbral' synthesizer able to output multiple layered sounds simultaneously when triggered by the same input notes.

What this leaves us with, then, is described in the following table, showing the three meanings of the term "paraphony". Meaning '1' still stands as what would be termed its 'official' and long-standing meaning, whereas meaning '2' was applied by Roland Corporation making up a 'sales-speak' word that actually already existed. Meaning '3' would seem to be a reinterpretation, possibly a misinterpretation of meaning '2' and its use has since become widespread. Meaning '3' has prevailed, effectively deprecating meaning '2'.

References

Synthesizers

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