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docs/phonemes.md: update the introduction text.

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Reece H. Dunn
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@@ -41,34 +41,24 @@ As well as using ASCII characters for specific IPA phonemes, this transcription
provides a set of 3-letter feature abbreviations allowing a phoneme to be
described as a sequence of features.
This document describes the IPA phonemes using the features used by Kirshenbaum.
Where Kirshenbaum does not specify a feature name, the feature name from
Cainteoir Text-to-Speech<sup>\[<a href="#ref5">5</a>\]</sup> is used. This is
to provide a consistent naming scheme for the extended feature set. Where there
is still no feature available, a custom 3-letter feature name is chosen.
The aim of the feature set described in this document is to specify the underlying
phonetics and phonemics of the sounds being produced in a way that is consistent
between languages and voices. While this feature set is modelled on the IPA, it
is not meant to be able to preserve phoneme transcriptions when using a
transcription as both the input and output phoneme sets. This document provides
commentary on the intended usage of these features where there is ambiguity from
the associated IPA usage between authors.
Kirshenbaum uses features that align with the way the IPA phoneme charts are
organised. This document uses the Kirshenbaum features as a base to work from,
but extends them to describe the underlying phonetic processes in a way that
is consistent between languages and voices.
This document is grouped into two sections. The first section displays the IPA
charts using the feature names instead of their names, showing the IPA phoneme
at that position in the chart. This makes it easier to look up the features for
a given IPA phoneme.
The second section lists the features and their associated name. This section
does not describe what these mean. Their meaning is described in phonetics
articles, books and Wikipedia. The Wikipedia IPA<sup>\[<a href="#ref4">4</a>\]</sup>
article can be used as a starting point, as it links to topics and descriptions
of the various phonemes.
The second section lists the features and their associated name. The Wikipedia
IPA<sup>\[<a href="#ref4">4</a>\]</sup> article can be used as a starting point
into the various phonetic topics contained in this document.
The diacritics and suprasegmental feature lists also show their corresponding
IPA symbol. This is to avoid duplicating the lists in the IPA Phonemes and Feature
sections.
The goal of this document is not to provide a detailed guide on phonetics.
Instead, it is designed to be a transcription guide on how to specify phonemes
in a language or voice so that the narrow transcriptions are consistent between
the two.
## IPA Phonemes