# Audio\_alsa\_sink problem on RPi2

**URL:** <https://www.ruby-forum.com/t/audio-alsa-sink-problem-on-rpi2/241386>\
**Category:** GNU Radio\
**Created:** [April 2, 2015, 9:30am UTC](https://www.ruby-forum.com/t/audio-alsa-sink-problem-on-rpi2/241386 "2015-04-02T09:30:21Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Detlef\_R](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/58f4c7/32.png) [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\
**Post date:** [April 2, 2015, 9:30am UTC](https://www.ruby-forum.com/t/audio-alsa-sink-problem-on-rpi2/241386/1 "2015-04-02T09:30:21Z")

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Hello,

When trying to use audio sink in GRC I get following error:

audio: using audio\_alsa  
audio\_alsa\_sink[hw:0,0]: set\_channels failed: Invalid argument

It’s the same with device “plughw:0,0”.  
No error with hw:0,1 (HDMI output but i’m not connected to a TV)

Something related to speakers channels ? On the RPi, there is only one  
jack output.

Thanks in advance for any help.