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From text to speech: The MITalk system
Table C-3: Default values for duration of forward smoothingf(Tc'f)
av 25 ave 20 af 40 asp 20
an 40 a2p 40 a3p 40 adp 40
aS5p 40 abp 40 ab 40 f0 120
f1 80 2 80 f3 80 f4 80
fnz 150 bl 80 b2 80 b3 80
Table C-4: Default values for Bper
Previous Current manner class
manner vowel stop fricative sonorant
class
vowel 50 35 50 75
stop 65 50 50 65
fricative 50 50 50 75
sonorant 25 35 25 50
Aspiration between voiced sonorant and following unvoiced consonant in-
trudes on the voicing:
Aspdux « 10 / [ +Sonsorant] [ ‘V?Eed]
Start frication early if fricative follows sonorant:
Cumdur(af] | 20, Segdur{af] T 20/
[ +sonsorant] [ -voiced, +fricative]
Aspam1 L 6/ [ +sonsorant] [ -voice-d_,- +stop]
If Aspdux was set above, then shift Cumdur[asp] earlier by the amount
Aspdux. Force the value of asp at the new Cumdur[asp] to be Aspaml and
linearly smooth asp over the 30 msec interval preceding Cumdur[asp]. (See Figure
C-1.)
FO transitions into and out of voiceless segments are discontinuous:
