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From: geheimnisse hier <geheimnisse.atl@gmail.com>
Date: Sat, 3 Feb 2018 23:37:52 -0500
Message-ID: <CANUK9SH2DSyjEqjAeMwM7byB7J-hPJgtovPcdKZ3WXSTrf5u_Q@mail.gmail.com>
Subject: Re: How to set default pcm device?
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You'll need to edit /etc/sysctl.conf

hw.snd.default_unit=3

Where the number is the pcm device to be used by default. To have it take
affect without rebooting:

sysctl hw.snd.default_unit=3

Any programs using sound will need to be restarted.

-G