# How to specify 'device name' of audio sink in gnu radio (Windows)

**URL:** <https://www.ruby-forum.com/t/how-to-specify-device-name-of-audio-sink-in-gnu-radio-windows/251905>\
**Category:** GNU Radio\
**Created:** [February 15, 2019, 11:15am UTC](https://www.ruby-forum.com/t/how-to-specify-device-name-of-audio-sink-in-gnu-radio-windows/251905 "2019-02-15T11:15:33Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![macredb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/a183cd/32.png) [@macredb](https://www.ruby-forum.com/u/macredb)\
**Post date:** [February 15, 2019, 11:15am UTC](https://www.ruby-forum.com/t/how-to-specify-device-name-of-audio-sink-in-gnu-radio-windows/251905/1 "2019-02-15T11:15:34Z")

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How to specify ‘device name’ of audio sink in gnu radio in Windows? I tryed a lot variants (for example HW:1,0) but always got a message:  
‘INFO: Warning: waveOut device ‘HW:1,0’ was not found, defaulting to WAVE\_MAPPER’

WAVE\_MAPPER is ok, but I need to use three cards simultaneously.