Sujet : USB MIDI device plug-in changes sound volume
De : OFeem1987 (at) *nospam* teleworm.us (Chris Ahlstrom)
Groupes : comp.os.linux.advocacy comp.os.linux.miscSuivi-à : comp.os.linux.miscDate : 27. Mar 2025, 14:21:20
Autres entêtes
Organisation : None
Message-ID : <vs3jcg$4scl$3@dont-email.me>
User-Agent : slrn/1.0.3 (Linux)
Been happening lately on my Debian Sid mini-PC. It has a USB-to-headphone
adapter [1] plugged in the back (USB 2), a USB 3 hub plugged into the front
via a USB-C to USB-B adapter, and another USB 3 hub plugged into that hub.
There are various USB-MIDI controller plugged in, plus a (currently unused)
USB audio codec from Behringer.
So I take one device (Korg nanoKey2) and plug it in. The volume drops.
I turn it up via alsamixer. But it would be nice to figure out what is
happening.
[1] This adapter is a Philips product bought at Target. In alsamixer,
it is called "iStore Audio". In pavucontrol, it's called "AB13X Headset Adapter
Analog Stereo". Via lsusb it's called "Walmart AB13X Headset Adapter".
--
It is now quite lawful for a Catholic woman to avoid pregnancy by a resort to
mathematics, though she is still forbidden to resort to physics and chemistry.
-- H. L. Mencken
USB MIDI device plug-in changes sound volume