The charts show the vowel and consonant systems of classical MHG. The spellings indicated are the standard spellings used in modern editions; there is much more variation in the manuscripts.
Vowels Short and long vowels Notes: • Not all dialects distinguish the three unrounded mid front vowels. • It is probable that the short high and mid vowels are lower than their long equivalents, as in Modern German, but that is impossible to establish from the written sources. • The found in unstressed syllables may indicate or
schwa .
Diphthongs Consonants • Precise information about the articulation of consonants is impossible to establish and must have varied between dialects. • In the plosive and fricative series, if there are two consonants in a cell, the first is
fortis and the second
lenis. The voicing of lenis consonants varied between dialects. • There are
long consonants, and the following double consonant spellings indicate not vowel length, as they do in Modern German orthography, but rather genuine double consonants:
pp,
bb,
tt,
dd,
ck (for ),
gg,
ff,
ss,
zz,
mm,
nn,
ll,
rr. • It is reasonable to assume that has an allophone after back vowels, as in Modern German. • The original Germanic fricative
s was in writing usually clearly distinguished from the younger fricative
z that evolved from the High German consonant shift. The sounds of both letters seem not to have merged before the 13th century. Since
s later came to be pronounced before other consonants (as in
Stein ,
Speer ,
Schmerz (original
smerz) or the southwestern pronunciation of words like
Ast ), it seems safe to assume that the actual pronunciation of Germanic
s was somewhere between and , most likely about , in all Old High German until late Middle High German. A word like
swaz, "whatever", would thus never have been but rather , later (13th century) , . Sequences of velar plus this older fricative also coalesced into a single long sound, as can be seen in modern German with a short vowel and a single consonant originating from Old High German . ==Grammar==