Linux Sound subsystem development
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From: Sandro Pischinger <kernel@sandropischinger.de>
To: tiwai@suse.com
Cc: perex@perex.cz, john@metanate.com, linux-sound@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Sandro Pischinger <kernel@sandropischinger.de>
Subject: [PATCH] ALSA: usb-audio: Add iface reset quirk for TASCAM US-16x08
Date: Mon, 12 Oct 2026 14:42:55 +0200	[thread overview]
Message-ID: <20261012124255.10485-1-kernel@sandropischinger.de> (raw)

When suspending and resuming the playback stream, audible
glitching/chirping appears on the audio interface's output for several
seconds.

On playback stream resumption, I observed an increase in feedback rate
up to 48,038Hz. This stabilized back to 48,000Hz after ~20s.

This is mitigated by applying an interface reset on stream resumption,
as introduced by John Keeping on the TASCAM Model 12.

Link: https://lore.kernel.org/20221129130100.1257904-1-john@metanate.com

Signed-off-by: Sandro Pischinger <kernel@sandropischinger.de>
---
 sound/usb/quirks.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 7cd806e9611b..8393a0af7b40 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -2578,6 +2578,9 @@ static const struct usb_audio_quirk_flags_table quirk_flags_table[] = {
 	DEVICE_FLG(0x0644, 0x8044, /* Esoteric D-05X */
 		   QUIRK_FLAG_ITF_USB_DSD_DAC | QUIRK_FLAG_CTL_MSG_DELAY |
 		   QUIRK_FLAG_IFACE_DELAY | QUIRK_FLAG_FORCE_IFACE_RESET),
+	DEVICE_FLG(0x0644, 0x8047, /* TASCAM US-16x08 */
+		   QUIRK_FLAG_CTL_MSG_DELAY | QUIRK_FLAG_IFACE_DELAY |
+		   QUIRK_FLAG_FORCE_IFACE_RESET),
 	DEVICE_FLG(0x0644, 0x804a, /* TEAC UD-301 */
 		   QUIRK_FLAG_ITF_USB_DSD_DAC | QUIRK_FLAG_CTL_MSG_DELAY |
 		   QUIRK_FLAG_IFACE_DELAY),

base-commit: b40a5f6d0e2a2b27b29d59d55fc92c5b9443e77c
-- 
2.56.0


             reply	other threads:[~2026-10-12 12:43 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-12 12:42 Sandro Pischinger [this message]
2026-10-12 15:01 ` [PATCH] ALSA: usb-audio: Add iface reset quirk for TASCAM US-16x08 Takashi Iwai

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