speak and spell (dictée magique) schematics
pitch points >> make your s&s sing in tune

connect the base point with the three other points via pots, ldrs or body contacts (recommended values : 500k or 1M linear). use a 47k resistor (or similar value, do your homework and make some tests) between the base and the pots/contacts to avoid permanent pitch drop. use a 47k (or 100k) resistor between the distortion point and the pot/contact to avoid (frequent) crashes.