### 18.1 Default intonation ¶

This is the simplest form of intonation and offers the modules `Intonation_Default` and `Intonation_Targets_Default`. The first of which actually does nothing at all. `Intonation_Targets_Default` simply creates a target at the start of the utterance, and one at the end. The values of which, by default are 130 Hz and 110 Hz. These values may be set through the parameter `duffint_params` for example the following will general a monotone at 150Hz.

    (set! duffint_params '((start 150) (end 150)))
    (Parameter.set 'Int_Method 'DuffInt)
    (Parameter.set 'Int_Target_Method Int_Targets_Default)