Pitch settings

Addivox is a monosynth — it plays one note at a time.
Transpose shifts every played note by a fixed number of semitones. The keyboard display still highlights the incoming MIDI note, but the sounded pitch is shifted by the transpose amount. This control is not patch-tied and keeps its value when you switch patches.
Tuning applies a global pitch offset in cents (hundredths of a semitone) to all harmonics. Like transpose, this is not patch-tied.
Portamento controls smooth pitch glides between notes. The rate of the glide is set by MIDI CC5 (typically the breath controller's bite sensor on a wind controller). The Min and Max values set the glide time range: Min is the glide time when CC5 is 0 (usually instant or very fast), and Max is the glide time when CC5 is at full value.