Festival Speech Synthesis System: - Speech Resource Pages

(set! rab_diphone_dir "/projects/festival/lib/voices/english/rab_diphone")
(set! rab_lpc_group
(list
'(name "rab_lpc_group")
(list 'index_file
(path-append rab_diphone_dir "group/rablpc16k.group"))
'(alternates_left ((i ii) (ll l) (u uu) (i@ ii) (uh @) (a aa)
(u@ uu) (w @) (o oo) (e@ ei) (e ei)
(r @)))
'(alternates_right ((i ii) (ll l) (u uu) (i@ ii)
(y i) (uh @) (r @) (w @)))
'(default_diphone @-@@)
'(grouped "true")))
(us_dipohone_init rab_lpc_group)
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20.4 Making groupfiles
The function us_make_group_file will make a group file of the currently selected US diphone database. It
loads in all diphone sin the dtabaase and saves them in the named file. An optional second argument allows
specification of how the group file will be saved. These options are as a feature list. There are three possible options
track_file_format
The format for the coefficient files. By default this is est_binary, currently the only other alternative is
est_ascii.
sig_file_format
The format for the signal parts of the of the database. By default this is snd (Sun's Audio format). This was
choosen as it has the smallest header and supports various sample formats. Any format supported by the
Edinburgh Speech Tools is allowed.
sig_sample_format
The format for the samples in the signal files. By default this is mulaw. This is suitable when the signal files
are LPC residuals. LPC residuals have a much smaller dynamic range that plain PCM files. Because mulaw
representation is half the size (8 bits) of standard PCM files (16bits) this significantly reduces the size of the
group file while only marginally altering the quality of synthesis (and from experiments the effect is not
perceptible). However when saving group files where the signals are not LPC residuals (e.g. in PSOLA) using
this default mulaw is not recommended and short should probably be used.
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20.5 UniSyn module selection
In a voice selection a UniSyn database may be selected as follows
(set! UniSyn_module_hooks (list rab_diphone_const_clusters ))
(set! us_abs_offset 0.0)
(set! window_factor 1.0)
(set! us_rel_offset 0.0)
(set! us_gain 0.9)
(Parameter.set 'Synth_Method 'UniSyn)
(Parameter.set 'us_sigpr 'lpc)
(us_db_select rab_db_name)