# NON- C-media Sound card and Pi GPIO **URL:** \ **Category:** AllStarLink\ **Created:** [April 15, 2019, 6:59pm UTC](https://community.allstarlink.org/t/non-c-media-sound-card-and-pi-gpio/14883 "2019-04-15T18:59:24Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Electricity440](https://community.allstarlink.org/user_avatar/community.allstarlink.org/electricity440/32/1474_2.png) [@Electricity440](https://community.allstarlink.org/u/Electricity440)\ **Post date:** [April 15, 2019, 6:59pm UTC](https://community.allstarlink.org/t/non-c-media-sound-card-and-pi-gpio/14883/1 "2019-04-15T18:59:24Z")
Is there any possibility in the foreseeable feature to use any ALSA ( or pulse audio) compatible sound card and the Pi GPIO pins (or anything else) for PTT/COR LOGIC? I would love to get away from being stuck to C-Media chips! How hard is it to add compatibility. Many other ham programs such as Direwolf Packet TNC use Alsa and several different PTT options and support any sound card that normally works on linux. skyler ---
**Author:** ![Jean-Michel\_Vien\_VA2](https://community.allstarlink.org/letter_avatar_proxy/v4/letter/j/e9a140/32.png) [@Jean-Michel\_Vien\_VA2](https://community.allstarlink.org/u/Jean-Michel_Vien_VA2)\ **Post date:** [April 15, 2019, 7:01pm UTC](https://community.allstarlink.org/t/non-c-media-sound-card-and-pi-gpio/14883/2 "2019-04-15T19:01:46Z")
There is a way to ise GPIO as PTT… But C-Media is cheap and easy to mod… What is your goal exactly? VA2XJM > **···** > > **From:** [electricity440@gmail.com](mailto:electricity440@gmail.com) > > **Sent:** April 15, 2019 14:59 > > **To:** [app\_rpt-users@lists.allstarlink.org](mailto:app_rpt-users@lists.allstarlink.org) > > **Reply to:** [app\_rpt-users@lists.allstarlink.org](mailto:app_rpt-users@lists.allstarlink.org) > > **Subject:** [App\_rpt-users] NON- C-media Sound card and Pi GPIO > > Is there any possibility in the foreseeable feature to use any ALSA ( or pulse audio) compatible sound card and the Pi GPIO pins (or anything else) for PTT/COR LOGIC? > > I would love to get away from being stuck to C-Media chips! > > How hard is it to add compatibility. Many other ham programs such as Direwolf Packet TNC use Alsa and several different PTT options and support any sound card that normally works on linux. > > skyler ---
**Author:** ![rkarroo](https://community.allstarlink.org/letter_avatar_proxy/v4/letter/r/76d3ee/32.png) [@rkarroo](https://community.allstarlink.org/u/rkarroo)\ **Post date:** [April 16, 2019, 2:54am UTC](https://community.allstarlink.org/t/non-c-media-sound-card-and-pi-gpio/14883/3 "2019-04-16T02:54:01Z")
I am also interested by this solution. My goal (rather our goal because I am not alone in this) is to be able to add a second interconnection medium. Currently in collaboration with the Radio Amateurs from Reunion Island, we (at 3B8) have set up an inter-island connection using svxlink reflector. It works fine though. An interface using the PI GPIO would help to seperate the fact of being tied up with one particular sound card.Moreover it would remove any possible electronic issue that may arise (humidity on the sound FOB etc) if the node is set remotely. 73s Rachid Karroo 3B8FP > **···** > > On Mon, Apr 15, 2019 at 11:02 PM Jean-Michel Vien VA2XJM [va2xjm@gmail.com](mailto:va2xjm@gmail.com) wrote: > > > There is a way to ise GPIO as PTT… But C-Media is cheap and easy to mod… > > > > > > What is your goal exactly? > > > > > > VA2XJM > > > **From:** [electricity440@gmail.com](mailto:electricity440@gmail.com) > > > **Sent:** April 15, 2019 14:59 > > > **To:** [app\_rpt-users@lists.allstarlink.org](mailto:app_rpt-users@lists.allstarlink.org) > > > **Reply to:** [app\_rpt-users@lists.allstarlink.org](mailto:app_rpt-users@lists.allstarlink.org) > > > **Subject:** [App\_rpt-users] NON- C-media Sound card and Pi GPIO > > > > > > Is there any possibility in the foreseeable feature to use any ALSA ( or pulse audio) compatible sound card and the Pi GPIO pins (or anything else) for PTT/COR LOGIC? > > > I would love to get away from being stuck to C-Media chips! > > > > > > How hard is it to add compatibility. Many other ham programs such as Direwolf Packet TNC use Alsa and several different PTT options and support any sound card that normally works on linux. > > > > > > skyler > > > * * * > > > > App\_rpt-users mailing list > > > > [App\_rpt-users@lists.allstarlink.org](mailto:App_rpt-users@lists.allstarlink.org) > > > > [http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app\_rpt-users](http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users) > > > > To unsubscribe from this list please visit [http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app\_rpt-users](http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users) and scroll down to the bottom of the page. Enter your email address and press the “Unsubscribe or edit options button” > > > > You do not need a password to unsubscribe, you can do it via email confirmation. If you have trouble unsubscribing, please send a message to the list detailing the problem. ---
**Author:** ![Jean-Michel\_Vien\_VA2](https://community.allstarlink.org/letter_avatar_proxy/v4/letter/j/e9a140/32.png) [@Jean-Michel\_Vien\_VA2](https://community.allstarlink.org/u/Jean-Michel_Vien_VA2)\ **Post date:** [April 16, 2019, 2:01pm UTC](https://community.allstarlink.org/t/non-c-media-sound-card-and-pi-gpio/14883/4 "2019-04-16T14:01:35Z")
The C-Media cards are used because of the PTT/COR easy modification/native support… There is tutorials about making PTT/COR using sometimes simple and sometimes more complex circuits or using the GPIO to control PTT… A quick google search will fix that. I remember there is a GPIO PTT repo on Github. VA2XJM > **···** > > **From:** [rkarroo@gmail.com](mailto:rkarroo@gmail.com) > > **Sent:** April 15, 2019 22:54 > > **To:** [app\_rpt-users@lists.allstarlink.org](mailto:app_rpt-users@lists.allstarlink.org) > > **Reply to:** [app\_rpt-users@lists.allstarlink.org](mailto:app_rpt-users@lists.allstarlink.org) > > **Subject:** Re: [App\_rpt-users] NON- C-media Sound card and Pi GPIO > > I am also interested by this solution. > > My goal (rather our goal because I am not alone in this) is to be able to add a second interconnection medium. Currently in collaboration with the Radio Amateurs from Reunion Island, we (at 3B8) have set up an inter-island connection using svxlink reflector. It works fine though. > > An interface using the PI GPIO would help to seperate the fact of being tied up with one particular sound [card.Moreover](http://card.Moreover) it would remove any possible electronic issue that may arise (humidity on the sound FOB etc) if the node is set remotely. > > 73s > > Rachid Karroo > > 3B8FP > > On Mon, Apr 15, 2019 at 11:02 PM Jean-Michel Vien VA2XJM [va2xjm@gmail.com](mailto:va2xjm@gmail.com) wrote: > > > There is a way to ise GPIO as PTT… But C-Media is cheap and easy to mod… > > > > > > What is your goal exactly? > > > > > > VA2XJM > > > **From:** [electricity440@gmail.com](mailto:electricity440@gmail.com) > > > **Sent:** April 15, 2019 14:59 > > > **To:** [app\_rpt-users@lists.allstarlink.org](mailto:app_rpt-users@lists.allstarlink.org) > > > **Reply to:** [app\_rpt-users@lists.allstarlink.org](mailto:app_rpt-users@lists.allstarlink.org) > > > **Subject:** [App\_rpt-users] NON- C-media Sound card and Pi GPIO > > > > > > Is there any possibility in the foreseeable feature to use any ALSA ( or pulse audio) compatible sound card and the Pi GPIO pins (or anything else) for PTT/COR LOGIC? > > > I would love to get away from being stuck to C-Media chips! > > > > > > How hard is it to add compatibility. Many other ham programs such as Direwolf Packet TNC use Alsa and several different PTT options and support any sound card that normally works on linux. > > > > > > skyler > > > * * * > > > > App\_rpt-users mailing list > > > > [App\_rpt-users@lists.allstarlink.org](mailto:App_rpt-users@lists.allstarlink.org) > > > > [http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app\_rpt-users](http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users) > > > > To unsubscribe from this list please visit [http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app\_rpt-users](http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users) and scroll down to the bottom of the page. Enter your email address and press the “Unsubscribe or edit options button” > > > > You do not need a password to unsubscribe, you can do it via email confirmation. If you have trouble unsubscribing, please send a message to the list detailing the problem. ---
**Author:** ![William\_Franzin](https://community.allstarlink.org/letter_avatar_proxy/v4/letter/w/6bbea6/32.png) [@William\_Franzin](https://community.allstarlink.org/u/William_Franzin)\ **Post date:** [April 16, 2019, 2:14pm UTC](https://community.allstarlink.org/t/non-c-media-sound-card-and-pi-gpio/14883/5 "2019-04-16T14:14:10Z")
Check this out [https://yo3iiu.ro/blog/?p=324](https://yo3iiu.ro/blog/?p=324) William > **···** > > On Mon., Apr. 15, 2019, 1:59 p.m. Skyler F, [electricity440@gmail.com](mailto:electricity440@gmail.com) wrote: > > > Is there any possibility in the foreseeable feature to use any ALSA ( or pulse audio) compatible sound card and the Pi GPIO pins (or anything else) for PTT/COR LOGIC? > > > I would love to get away from being stuck to C-Media chips! > > > > > > How hard is it to add compatibility. Many other ham programs such as Direwolf Packet TNC use Alsa and several different PTT options and support any sound card that normally works on linux. > > > > > > skyler > > > * * * > > > > App\_rpt-users mailing list > > > > [App\_rpt-users@lists.allstarlink.org](mailto:App_rpt-users@lists.allstarlink.org) > > > > [http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app\_rpt-users](http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users) > > > > To unsubscribe from this list please visit [http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app\_rpt-users](http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users) and scroll down to the bottom of the page. Enter your email address and press the “Unsubscribe or edit options button” > > > > You do not need a password to unsubscribe, you can do it via email confirmation. If you have trouble unsubscribing, please send a message to the list detailing the problem.