• stefano_zorzanello

    Hi everyone,
    in one of my recent posts I've been successfully helped in using rtlsdr~, thank you again myQwil!
    The patch proposed and developed by Tom Zicarelli
    [https://github.com/tkzic/pd-rtlsdr](link URL)
    is used for radio demodulation, which is absolutely great, but now I wonder if anyone, beyond receiving and demodulating radio signals has developed an object or abstraction to transmit SDR - radio signals directly from PD.
    Thank you and best regards

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  • stefano_zorzanello

    Great myQwil!
    by your kind advice i COULD MAKE IT WORK! Now, replacing the rtlsdr~.pd_linux object with the newly created one in their externals folder, both pd-vanilla and purr-data do create rtlsdr~


    I'm so happy that my project can start from here.

    Just in purr-data at the moment I can't get the audio work because of some errors that I don't understand:

    here's the console report only error at start-up

    libdir_loader: added 'pdlua' to the global objectclass path
    tried but couldn't sync A/D/A

    and then when I put the dsp on I get

    error: audio I/O dropout (with a red numerical index in brackets increasing each 5/6 seconds, or so)

    the dsp is working as I can see the audio signal operating, but no audio from the dac

    I can't find also any place where to set the usb sound card I'm using with rpi

    any idea?

    anyway, at least pd-vanilla works fine and this is most important thing.

    thank you again

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  • stefano_zorzanello

    thank myQwil again, I've installed the stuff you told me with

    apt install librtlsdr0

    apt install librtlsdr-dev

    the following lines are the report from terminal

    pi@raspberrypi:~ $ sudo apt install librtlsdr0
    sudo: /etc/sudoers.d is world writable
    [sudo] password for pi:
    Reading package lists... Done
    Building dependency tree
    Reading state information... Done
    librtlsdr0 is already the newest version (0.5.3-11+rpt1).
    The following packages were automatically installed and are no longer required:
    coinor-libipopt1v5 libbluray2 libmicrodns0 libmumps-seq-4.10.0 libraw15
    Use 'sudo apt autoremove' to remove them.
    0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
    pi@raspberrypi:~ $ cd /usr/lib/pd/extra/pd-rtlsdr-master/src/pd/linux/rtlsdr~
    pi@raspberrypi:/usr/lib/pd/extra/pd-rtlsdr-master/src/pd/linux/rtlsdr~ $ make
    make: Nothing to be done for 'pd_linux'.

    then I replaced the new [rtlsdr~.pd_linux] into the extra folder, but pd still couldn't create the object

    one qustion does it work fo you with purr-data or just pd?

    thank you for your patience...


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  • stefano_zorzanello

    Thank you very much myQwill for your answer!
    I followed your tip, installed the librtlsdrO (zero) but nothing changed... I think tht the problem remains in the external [rtlsdrì~] that needs to be compilerd, and I don't know how to do that...

    I put again here the Zicarelli git-hub repository

    [https://github.com/tkzic/pd-rtlsdr](link url)

    if anyone could help it's very much appreciated.


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  • stefano_zorzanello

    dear list,
    I'm new here.
    I'm developing a pd&software-defined radio project for a sound-art installation using rpi.

    I'm trying to get purr-data working in order to obtain some software-defined radio functions into a patch. In particular I like the idea of detecting in pd the RF field, and usign radio signals as an input and as a kind of invisible/inaudible landscape (since it is not demodulated).

    Tom Zicarelli developed an rtlsdr~ object

    [https://github.com/tkzic/pd-rtlsdr](link url)

    he says that it should be used with pd-extended but currently I'm not able to run pd-extended in rpi

    the patch he put as an examle "rtlSDR-block.pd" seems to open perfectly for every object but rtlsdr~

    I'have put all the rtlsdr~ files into the extra folders, but purr-data cannot create it anyway

    does anybody could help me in doing this trick?

    Any help is greatly appreciated!

    love for your great work


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