linux-kernel - [PATCH] ALSA: usb-audio: Add DSD support for Comtrue USB Audio device

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Message-ID: <001e01dc01d6$cc4c64e0$64e52ea0$@comtrue-inc.com>
Date: Thu, 31 Jul 2025 12:51:37 +0800
From: <noble.yang@...true-inc.com>
To: <tiwai@...e.com>,
	<perex@...ex.cz>,
	<hulianqin@...o.com>,
	<lina+kernel@...hilina.net>,
	<cyan.vtb@...il.com>,
	<dan.carpenter@...aro.org>,
	<bsevens@...gle.com>
Cc: <linux-sound@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH] ALSA: usb-audio: Add DSD support for Comtrue USB Audio device

The vendor Comtrue Inc. (0x2fc6) produces USB audio chipsets like

the CT7601 which are capable of Native DSD playback.

This patch adds QUIRK_FLAG_DSD_RAW for Comtrue (VID 0x2fc6), which enables

native DSD playback (DSD_U32_LE) on their USB Audio device. This has been

verified under Ubuntu 25.04 with JRiver.

Best Regards !

===========================

Noble Yang

Cell : +886-955-347822

晨臻股份有限公司

Comtrue Inc.

www.comtrue-inc.com <http://www.comtrue-inc.com/> 

新地址 : 新竹縣竹北市縣政十街10號2F之1

2F.-1, No. 10, Xianzheng 10th St., Zhubei City, Hsinchu County 302, Taiwan
(R.O.C.)

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