# Unable to open audio output device in Juce Plug-In Host

**URL:** <https://forum.juce.com/t/unable-to-open-audio-output-device-in-juce-plug-in-host/66297>\
**Category:** Getting Started\
**Created:** [June 6, 2025, 10:39pm UTC](https://forum.juce.com/t/unable-to-open-audio-output-device-in-juce-plug-in-host/66297 "2025-06-06T22:39:39Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![lilbrd](https://avatars.discourse-cdn.com/v4/letter/l/9de053/32.png) [@lilbrd](https://forum.juce.com/u/lilbrd)\
**Post date:** [June 6, 2025, 10:39pm UTC](https://forum.juce.com/t/unable-to-open-audio-output-device-in-juce-plug-in-host/66297/1 "2025-06-06T22:39:39Z")

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When trying to test my plug-in, the built-in Juce Plug-In Host is unable to open my headphones when setting them as the audio output device. I’ve tried disabling any other audio devices, changing between Windows Audio, exclusive mode, etc. My headphones run with the Realtek audio driver. When attempting to set audio device as my headphones it pops up with the following error:

“Error when trying to open audio device! Couldn’t open audio device!”

Any help with this would be appreciated as I obviously can’t work on my plugin until I get this working or find an alternative.

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**Author:** ![lilbrd](https://avatars.discourse-cdn.com/v4/letter/l/9de053/32.png) [@lilbrd](https://forum.juce.com/u/lilbrd)\
**Post date:** [June 13, 2025, 8:22pm UTC](https://forum.juce.com/t/unable-to-open-audio-output-device-in-juce-plug-in-host/66297/2 "2025-06-13T20:22:46Z")

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Since nobody’s replied: while I didn’t get the Juce Plug-In Host working, I simply began using the standalone build for testing which works thus far. When testing the VST3 I will most likely just open it in my DAW.