# No sound with (Supported) GPIO DAC

**URL:** <https://forums.balena.io/t/no-sound-with-supported-gpio-dac/195024>\
**Category:** balenaSound\
**Created:** [September 30, 2020, 3:31pm UTC](https://forums.balena.io/t/no-sound-with-supported-gpio-dac/195024 "2020-09-30T15:31:09Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![abdo123](https://avatars.discourse-cdn.com/v4/letter/a/5fc32e/32.png) [@abdo123](https://forums.balena.io/u/abdo123)\
**Post date:** [September 30, 2020, 3:31pm UTC](https://forums.balena.io/t/no-sound-with-supported-gpio-dac/195024/1 "2020-09-30T15:31:10Z")

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Hello,

I recently purchased the Hifiberry Digi+ Pro and i plugged it in on the GPIO like it should

I added the configuration variable ‘BALENA\_HOST\_CONFIG\_dtoverlay’ with value ‘hifiberry-digi’. I also added the environment variable ‘SOUND\_OUTPUT’ with the value ‘DAC’.

However there is no sound output with the Airplay or the bluetooth input. the card is recognized with alsamixer (SSH on the audio block). i tried running ‘speaker-test -c1’ (SSH on the audio block) and no sound either.

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**Author:** ![abdo123](https://avatars.discourse-cdn.com/v4/letter/a/5fc32e/32.png) [@abdo123](https://forums.balena.io/u/abdo123)\
**Post date:** [September 30, 2020, 3:58pm UTC](https://forums.balena.io/t/no-sound-with-supported-gpio-dac/195024/4 "2020-09-30T15:58:24Z")

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I tried to remove the sound output variable, now the sound is playing through 3.5mm Jack.

I’m attempting a clean install of balena sound to see if it works then.

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**Author:** ![abdo123](https://avatars.discourse-cdn.com/v4/letter/a/5fc32e/32.png) [@abdo123](https://forums.balena.io/u/abdo123)\
**Post date:** [September 30, 2020, 4:02pm UTC](https://forums.balena.io/t/no-sound-with-supported-gpio-dac/195024/5 "2020-09-30T16:02:26Z")

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Going over the documentation on Hifiberry it says to use `hifiberry-digi-pro` as a dtoverlay value. I will test this and let you know.

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**Author:** ![phil-d-wilson](https://sea2.discourse-cdn.com/balena/user_avatar/forums.balena.io/phil-d-wilson/32/3730_2.png) [@phil-d-wilson](https://forums.balena.io/u/phil-d-wilson)\
**Post date:** [October 1, 2020, 8:08am UTC](https://forums.balena.io/t/no-sound-with-supported-gpio-dac/195024/7 "2020-10-01T08:08:23Z")

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Hi Abdul,

It appears like the Hifiberry Digi+ Pro isn’t on our list of supported DACs:

> **[Audio interfaces - Home](https://sound.balenalabs.io/docs/audio-interfaces/)**
>
> Build a single or multi-room streamer for an existing audio device using a Raspberry Pi! Supports Bluetooth, Airplay and Spotify Connect

But that doesn’t mean it won’t work - it just means we haven’t confirmed it works, and which dtoverlay one would need. I agree that from the hifiberry docs, the `hifiberry-digi-pro` should work:

> **[Configuring Linux 4.x or higher | HiFiBerry](https://www.hifiberry.com/docs/software/configuring-linux-3-18-x/)**

Please let us know what you find, and if you have any more issues.

Phil

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<div class="post-metadata">

**Author:** ![abdo123](https://avatars.discourse-cdn.com/v4/letter/a/5fc32e/32.png) [@abdo123](https://forums.balena.io/u/abdo123)\
**Post date:** [October 1, 2020, 8:33am UTC](https://forums.balena.io/t/no-sound-with-supported-gpio-dac/195024/9 "2020-10-01T08:33:54Z")

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Hello, everything seems to be working perfectly with dtoverlay from Hifiberry. I added an issue on Github incase proper support need to be coded into the software.

Cheers!

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**Author:** ![phil-d-wilson](https://sea2.discourse-cdn.com/balena/user_avatar/forums.balena.io/phil-d-wilson/32/3730_2.png) [@phil-d-wilson](https://forums.balena.io/u/phil-d-wilson)\
**Post date:** [October 1, 2020, 8:56am UTC](https://forums.balena.io/t/no-sound-with-supported-gpio-dac/195024/10 "2020-10-01T08:56:25Z")

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Winner! Thanks for letting us know. We’ll get the DAC added to the list.

Phil