From: Takashi Iwai <tiwai@suse.de>
To: Will Porter <mrwillporter@gmail.com>
Cc: linux-sound@vger.kernel.org, Takashi Iwai <tiwai@suse.com>,
Jaroslav Kysela <perex@perex.cz>, Neil Andrews <neil@androos.io>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] ALSA: usb-audio: Add iD14 MkI to monitor-mix volume quirk
Date: Sun, 23 Aug 2026 11:05:26 +0200 [thread overview]
Message-ID: <87fr05w6jt.wl-tiwai@suse.de> (raw)
In-Reply-To: <20260823015353.686080-1-mrwillporter@gmail.com>
On Sun, 23 Aug 2026 03:53:53 +0200,
Will Porter wrote:
>
> Add the iD14 MkI USB ID to the existing audient_id14_map. This
> names feature unit 12 Monitor Mix Playback Volume.
>
> Live meter A/B testing on MkI USB ID 2708:0002 reproduced the same
> asymmetric attenuation seen on MkII. At ALSA value 104, the right
> channel was 23.07 dB below the left. At 127, both channels were equal.
>
> The misleading Speaker Playback Volume name causes PipeWire to adopt
> FU12 as the stream master. Reuse the existing map to keep the control
> available while preventing that selection.
>
> Hardware-tested on Bazzite 7.2.0-ogc4.1.fc44.x86_64 with this change
> backported. ALSA exposed Monitor Mix Playback Volume after module load
> and USB reconnect. PipeWire volume changes from 100% to 35% and back
> left all four FU12 values at 127. Channel-isolated left/right playback
> remained balanced after reconnect.
>
> Build-tested with CONFIG_SND_USB_AUDIO=m using the focused sound/usb
> target.
>
> Assisted-by: Codex:gpt-5
> Signed-off-by: Will Porter <mrwillporter@gmail.com>
Applied now. Thanks.
Takashi
prev parent reply other threads:[~2026-08-23 9:05 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-23 1:53 [PATCH] ALSA: usb-audio: Add iD14 MkI to monitor-mix volume quirk Will Porter
2026-08-23 9:05 ` Takashi Iwai [this message]
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