Re: flite configuration

[Didier Spaier]

Salut Nicolas,

On 25/11/2020 19:29, Nicolas Graner wrote:
> SPD's "rate" parameter (from -100 to 100) has to be converted to a
> "stretch" parameter, where a larger value means slower speech. Since the
> generic module only allows linear conversions, I decided to map 0
> (normal speed) to 1 and -100 (very slow) to 2, which means +100 (very
> fast) maps to 0. This is done with these two parameters:
>
> GenericRateMultiply -1
> GenericRateAdd 1

Thanks for the hint! I will update the config file accordingly.

> On the other hand, SPD's "pitch" should be mapped to a mean frequency.
> Unfortunately, the pitch is relative (-100, to 100) while the frequency
> is absolute, and its normal value if different for each voice. I don't
> know how a pitch of 0 could be mapped to the normal frequency for each
> voice and other values adjusted accordingly.
> At the moment I've changed the GenericExecuteSynth command to ignore the
> pitch completely, but that's not very satisfactory.

Indeed. Unfortunately I can't help much as I don't know well enough
speech-dispatcher (and I don't use it but for testing, being sighted).

@Samuel maybe you will have some clue? the command in the config file is:

GenericExecuteSynth "flite -voice /usr/share/flite/voices/$VOICE \
--setf duration_stretch=$RATE --setf int_f0_target_mean=$PITCH -t \'$DATA\'"

If I remember well the limitation of the generic module that you
mentioned was rather about the volume setting than the pitch but
I could be wrong, as I am not Donald J. Trump (sorry, I couldn't
resist).

Cheers, Didier