Completely rebuilt on July 01, 99
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The next images are the main vowels used Cardinal Vowel diagrams;
the left one is with IPA (Thanks, it's from International Phonetic Alphabet), and
the right is with EL phonetics, corresponding each other position.
# The part of the tongue that is raised:
front > center > back. (from the left to the right)
# Close, mid-close, mid-open, open are the extent to which the tongue rises in the direction of the palate.
# The main kind of opening made at the lips is symbolically shown by the shape of a vowel base in EL, and a combination of them or a combination of a vowel and another diacritic forms a phonetic base overlay.
* Americans use various mid central vowels instead of the central schwa, so I added a rhotic one in the EL version.
* I use technical terms sometimes with casual English explanations.
Technical terms are more explained here.Joe Pike in California made a robot sound set for EL vowels above.
[i],
[ e ],
[a],
(Cardinal vowel 16) show each basic vowel with natural lips;
[o],
[u],
[Y] show each basic vowel with formed lips.
# Two vowel bases are compounded on top of each other usually to show the middle sound of the vowels.
(NB):
to another vowel or consonant in a base overlay and does not change the tongue raising position
even if it's compounded with another vowel.
# Many more distinguishing vowels are available with other diacritics which change the shift of vocal organs, such as:
( more open ),
( less open),
(backward or inner),
(forward or outer),
(nasalized), etc.
# Vowel bases can be compounded with an approximant (produced by breathing
without friction through between almost approached organs of a certain consonant)
and represent a little different approximants from the originals.
# Some of the vowel bases are compounded with a consonant,
and work as diacritics with each tongue position or the shape of lips.
It needs some vowel or nasal situation at the same time to produce a consonant
that uses the vocal cord + glottis (for [h]) or the pharynx.
# When a vowel symbol is alone, it is a short syllable vowel.
# When two vowels are lining side by side without any syllabic sign,
these are pronounced as a diphthong shortly pronounced for each one.
# To show continuous independent vowels, compound(syllabic diacritic)
on top of the left vowel character to show that phoneme is one independent syllable. E.g.:
: The vowel of [ai] of 'high' in English; pronounced as a diphthong.
# To change the length longer or adding tones or accents or some extra trilling vibration, the particular symbol is compounded or is put right next to the vowel. For more, see the diacritics section .
* For convenience to check the dictionary, each base number is
in ( ) or { }.
[ i ](04)
Cardinal vowel 1:
Close front unrounded ( The symbolic shape of a
horizontal line to show the very narrow extent ); when it compounded with
a consonant, it works for palatalization: raising tongue to a high front
position at the same time as the primary articulation is made.
{04,19} Close central
unrounded vowel: raised tongue position inner(19) 
{04,ge} Almost fully
close front unrounded vowel: [ i ] (04) + [ e ] (ge)
[ Y ](13)
Almost fully close front rounded vowel (The base symbolizes the power
of the lips horizontally widely rounded )
{13,20} [y] Cardinal
vowel 9: Close front rounded: raised tongue position outer(20)
[ e ] (ge)
Cardinal vowel 2:
{19,ge}
Close-mid central unrounded vowel: inner(19) 
{07,ge}
Cardinal vowel 3: open-mid front unrounded: the room open wider(07) 
{07,19,ge}
Open-mid central unrounded vowel: inner(19), wider(07) 
{07,19,34,ge} Open-mid central rounded vowel: rounded diacritic(34) 
{20,64,ge}
Putting the tongue out as much as possible(a kid makes a face sounding
this): emphasized(64) outer(20)
[ a ] (67)
Cardinal vowel 4:
{63,67}
Almost fully open central unrounded vowel: loosened diacritic(63) ( when
#63 compounded with a vowel, it makes the vowel a little closer to the mid
central loosening the opening or closing and the tongue stretching or shrinking
power ) 
{19,67}
Cardinal vowel 5: open back unrounded: inner or backward(19) 
{34,19,67}
Cardinal vowel 13: open back rounded: Rounded(34) 
{ge,67}
Almost fully open front unrounded vowel: the middle between [e](ge) and
[a](67) 
{08,19,67}
Cardinal vowel 14: open mid back unrounded: less opening room(08) 
{30,67}
Mid central vowel: the middle between #30 and [a](67): schwa 
{34,67}
Cardinal vowel 12: open front rounded: [a](67) with rounded diacritic(34)
{17,67}
Advanced tongue root open vowel: When #17 directly compounded with a phoneme,
it make the tongue root of the phoneme advance. 
{18,67}
Retracted tongue root open vowel: When #18 directly compounded with a phoneme,
it makes the tongue root of the phoneme retract.[ o ] (34)
Cardinal vowel 7:
(with #63) is for a half rounded.
{20,34}
Close-mid central rounded vowel: outer (20) 
{07,34}
Cardinal vowel 6: open-mid back rounded: opening wider (07) 
{ge,34}
Cardinal vowel 10: close-mid front rounded: [ e ] (ge) + [ o ] (34) 
{07,ge,34}
Cardinal vowel 11: open-mid front founded: opening wider (07)
(30) Cardinal vowel 16:
{07,30}
Cardinal vowel 15: close-mid back unrounded
[u] Cardinal
vowel 8:
{31,63}
Almost fully close back rounded vowel: Loosened and centralized(63) + [ u ]
(31)
{04,31} Close central
labialized vowel: the middle between [ u ] (31) and [ i ] (04) 
{31,36}
Labialized rhotic vowel: with curled up tongue [ r ] (36)
{52,63}
[ j ] Palatal approximant: voiced palatal (52), loosened (63) ; works for palatalization.
{31,52,63}
Voiced labial-palatal approximant: {labialized (31), {52,63} [ j ] Palatal approximant}
{31,64} [ W ] Excessive labiovelar approximant: through strongly (64) pointed shaped
lips (31)
(When labial works excessively, usually velar comes close automatically)
[l](14)Alveolar
lateral approximant( The base symbolizes the tongue dividing the air
on the both side ); lateral release diacritic in a base overlay (14)
{14,20} Dental lateral:
outer (front) position than the standard (20) 
{14,36} Retroflex
lateral approximant: retroflex (36) 
{14,04} Palatal lateral
approximant: lateral (14) with palatal vowel (04)(NB): When #63 or #64 is compounded with a consonant base and a vowel or semivowel together in a base overlay, the consonant is given the priority to work with it, and totally pronounced as an approximant.
{30,14} Velar lateral
approximant: velarized vowel (30)
{10,63} Velar approximant:
loosened (63) voiced velar (10); the same to #30; works for velarization.
(36)Alveolar
approximant{36,63} { the tongue tip raised(36) loosely(63) }:
Rhotic open-mid central unrounded vowel (Americans pronounces in various ways for schwa)
{63,66} Dental approximant: loosened (63) voiced dental (66)
{36,64} Retroflex approximant: emphasized (64)
{38,63} [υ] Labiodental approximant: voiced labiodental(38)
