From: Kitty Makin <autumnull@posteo.net>
To: linux-sound@vger.kernel.org
Cc: tiwai@suse.com, perex@perex.cz, linux-kernel@vger.kernel.org,
Kitty Makin <autumnull@posteo.net>
Subject: [PATCH] ALSA: usb-audio: Add capture quirk for Behringer FCA1616
Date: Mon, 14 Sep 2026 00:24:24 +0000 [thread overview]
Message-ID: <20260914002334.12691-1-autumnull@posteo.net> (raw)
The Behringer FCA1616 (1397:0004) returns silent capture samples unless its
playback endpoint is active.
Use the existing fixed implicit-feedback mechanism to keep playback endpoint
0x01 on interface 1 active during capture.
Tested with 16-channel S32_LE capture at 44.1 and 48 kHz.
Signed-off-by: Kitty Makin <autumnull@posteo.net>
---
sound/usb/implicit.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/sound/usb/implicit.c b/sound/usb/implicit.c
index 77f06da93..bd4d569a8 100644
--- a/sound/usb/implicit.c
+++ b/sound/usb/implicit.c
@@ -76,6 +76,7 @@ static const struct snd_usb_implicit_fb_match playback_implicit_fb_quirks[] = {
/* Implicit feedback quirk table for capture: only FIXED type */
static const struct snd_usb_implicit_fb_match capture_implicit_fb_quirks[] = {
+ IMPLICIT_FB_FIXED_DEV(0x1397, 0x0004, 0x01, 1), /* Behringer FCA1616 */
{} /* terminator */
};
--
2.55.0
next reply other threads:[~2026-09-14 0:24 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-14 0:24 Kitty Makin [this message]
2026-09-14 6:18 ` Takashi Iwai
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