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I am trying to configure my USB sound card for use on the pi. With the graphical interface, I can change the sound card and output the sound to the USB card.

Without the graphical interface with Putty (no screen in HDMI), the sound does not come out of the USB card. I modified this in the /usr/share/alsa/alsa.conf file:

defaults.ctl.card 1
defaults.pcm.card 1

Do you know how can I solve this problem?aplay

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I see you have created a new user, sgl. This user must be in the audio group to use audio devices with only a remote login. Furthermore, you may have to remove the pi user from that group, as having several users with exclusive access to audio hardware can create conflicts.

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