Piezo input Pure Data

Knallberto

Hi,

I have found an example which describes how to use a Piezo sensor as an input trigger: https://github.com/BelaPlatform/Bela/wiki/Example-projects-and-tutorials#sample-piezo Is a similar example also available for Pure Data?

Best regards
Andy

giuliomoro

You could use a combination of some of the examples that come with the Bela IDE:

PureData/envelope-trigger/ shows how to generate a trigger from an input signal. Then for playback, you can use Pd's classic [soundfiler] / [tabplay~] or [readsf~] or investigate some of the more complex options available in the Bela examples, e.g.:PureData/accelerometer/playAudioFile~.pd, which provides fade in/fade out and pitch control.

Knallberto

Thank you, is there an easy way to send the incoming data to a PD patch that is running on my laptop for fine tuning? (via the USB connection)

giuliomoro

Knallberto Thank you, is there an easy way to send the incoming data to a PD patch that is running on my laptop for fine tuning? (via the USB connection)

You won't be able to send audio-rate data. You can send MIDI quite easily, though. See the PureData/midi-cv-midi example. Or you can send OSC or other UDP or TCP packets between the two.

Knallberto

Thanks for the info, I tried running the osc-send example, but in the local pd patch I do not receive anything. Could this be related to the backgound Neopixel patch I have running (https://forum.bela.io/d/3001-control-neopixel-with-pure-data/7) ?

giuliomoro

as far as I can see, the port number (7562) is the same between O2L and PureData/osc-send, however:

O2L: port 7562 is opened on Bela, data flows host->Bela
PureData/osc-send: port 7562 is opened on the host, data flows Bela->host

so there should be no conflict between the two, but I may be missing something. Try changing the port in both patches of PureData/osc-send and see if that helps.

Knallberto

Thanks for the reply. I tried 7651 and also to turn off the windows firewall. But it did not help.

giuliomoro

Oh right, you are on Windows. Then try 192.168.6.1 as the destination from Bela. Also, yes verify the firewall is open.

Knallberto

Thanks, this solved the problem