[PD] midi novice

[Green]

hallo
never used midi before and i'm trying to figure out how to control a mab-303
synth from pd.
i'm stuck cause the synth manual says the slide function is
controled/triggered by sending a "controller #64" or "controller #65"
message to the machine. any of you know what that is, and how to do it from
pd? i'm sure this is very obvious but the manual is very cryptic.
peace
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