Hello!
I am using a raspberry pi and puredata to make a drum kit. I have sounds which are read through soundfiler and I activate them by using Gpio inputs via wiringPi.
Now I am trying to use an arduino to read analog values from the peizoelectric sensors, map them to midi value, and send them via a usb midi cable to puredata.
That is done, but how will I be able to play back sounds with a volume that is equal to the velocity in the midi packet?
Example- If I strike the sensor hard, the arduino sends 127 as midi value and puredata should play back a sound at full volume, and if I strike the sensor softly, the sound should play back at less volume.

Note that I am thinking of having velocity sensitivity, and not aftertouch (would be cool to add later on).

Regards,
Shaurya

@flight453

You might also want to filter out 0 velocity. Otherwise the volume attenuator will cut off the sound instantly when receiving a note-off message.

(velocity source)
|
[moses 1]
        | right outlet
        [/ 127]

... and then as above. (Maybe add an envelope too.)

hjh

Thank you so much for helping!