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virtual wire and sound

hello .... i am trying to have a machine (equipe with an arduino (virtual wire library ... TX ) ) sending information over another arduino equiped with virtual wire library(RX) and pduino firmata ( the cicuit is  (resistor 10k from pwm ... to the ground) 330 ohm from pwm to the analogPin() so that i can read analog input into the pd patch ... right?????)

i think the key is how to convert the rx signal into (map, 0, 255,) ... or something like that but the question is how ???...