# Issues with first run (no sound, no webconfig...)

**URL:** <https://discourse.zynthian.org/t/issues-with-first-run-no-sound-no-webconfig/2671>\
**Category:** Building Zynthian\
**Created:** [January 28, 2019, 7:45am UTC](https://discourse.zynthian.org/t/issues-with-first-run-no-sound-no-webconfig/2671 "2019-01-28T07:45:37Z")\
**Posts on this page:** 1\
**Showing post:** 76

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**Author:** ![jofemodo](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/jofemodo/32/2_2.png) [@jofemodo](https://discourse.zynthian.org/u/jofemodo)\
**Post date:** [February 3, 2019, 1:01am UTC](https://discourse.zynthian.org/t/issues-with-first-run-no-sound-no-webconfig/2671/76 "2019-02-03T01:01:34Z")

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> [@arkhhh](#):
>
> There’s this 4 pins connector on AIO wich obviously is this same schem’s switch 4 pins but it is not described nor present on photos or the wiki guide.  
> What’s his purpose ?

> [@Extra Switches (sw1): Sustain Pedal, Panic Button, etc](https://discourse.zynthian.org/t/extra-switches-sustain-pedal-panic-button-etc/1843):
>
> Hello, my zynthian still is on its way to me, but i already wonder if it would be possible to attach a Sustail Pedal (Foot switch, on/off) to one of the GPIO pins of the Raspberry Pi and have this coupled via software to the Midi sustain Signal? It might be useful for keyboards which do not provide this option. Regards, hal

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