From beb34fe8312eda37b9cf1568550d722530444822 Mon Sep 17 00:00:00 2001 From: Kitty Makin Date: Mon, 14 Sep 2026 00:24:24 +0000 Subject: [PATCH] ALSA: usb-audio: Add capture quirk for Behringer FCA1616 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 Link: https://patch.msgid.link/20260914002334.12691-1-autumnull@posteo.net Signed-off-by: Takashi Iwai --- sound/usb/implicit.c | 1 + 1 file changed, 1 insertion(+) diff --git a/sound/usb/implicit.c b/sound/usb/implicit.c index 77f06da93151..bd4d569a8190 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 */ };