To do the synchronisation of the lips with the animation can use papagayo a free software that allows us synchronise the audio with the drawings of the corresponding mouths. We matter the audio in WAV previously recorded (in audacity for example)
Write the sentence such cual says in the audio. We can save the project in case we need to do them modifications, the archives save eat “.pgo”
When have the movements of lips that convinces us can export “.lst” (Format MOLD), this archive have to save it in the same folder that the mouths.
The typical phonemes of the Spanish are: AI, E, FV, L, MBP, O,U, rest, etc.
Once here can matter it in Synfig Studio to see as it remains the animation
Also have to matter the audio in synfig.