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Fri, 24 Jul 2026 09:10:43 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id A7tkMhMsY2qxJQAAD6G6ig (envelope-from ); Fri, 24 Jul 2026 09:10:43 +0000 Date: Fri, 24 Jul 2026 11:10:43 +0200 Message-ID: <8733x8eorw.wl-tiwai@suse.de> From: Takashi Iwai To: Markus Lindner Cc: perex@perex.cz, tiwai@suse.com, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] ALSA: usb-audio: Add dB map quirk for Razer Barracuda X 2.4 In-Reply-To: References: User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/30.2 Mule/6.0 MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-Spamd-Result: default: False [-3.30 / 50.00]; BAYES_HAM(-3.00)[99.99%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-0.992]; MIME_GOOD(-0.10)[text/plain]; MIME_TRACE(0.00)[0:+]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; ARC_NA(0.00)[]; FREEMAIL_TO(0.00)[outlook.at]; FUZZY_RATELIMITED(0.00)[rspamd.com]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FREEMAIL_ENVRCPT(0.00)[outlook.at]; RCVD_TLS_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_FIVE(0.00)[5]; FROM_EQ_ENVFROM(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.de:mid] Message-ID-Hash: CVCKRZY7OWKU3WGVQ3SAOXVLLDQ357QW X-Message-ID-Hash: CVCKRZY7OWKU3WGVQ3SAOXVLLDQ357QW X-MailFrom: tiwai@suse.de X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; emergency; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.10 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: On Wed, 22 Jul 2026 03:09:18 +0200, Markus Lindner wrote: > > The Razer Barracuda X 2.4 GHz USB headset dongle (0x1532:0x0552) > reports a minimum volume register value of cval->min = -16800. > > In UAC 1/256 dB units, -16800 corresponds to -65.625 dB. However, > stock ALSA misinterprets this raw integer as 1/100 dB units > (-168.00 dB), causing user-space audio servers (PipeWire / > PulseAudio) to map their volume curves against an incorrectly wide > range. > > Add an explicit usbmix_dB_map entry overriding Unit 2 to -6562 > (-65.62 dB) to accurately report the physical hardware > attenuation bounds. > > Signed-off-by: Markus Lindner Applied now. But at the next time, please submit to linux-sound@vger.kernel.org instead of alsa-devel ML. alsa-devel ML is only for user-space stuff for now. thanks, Takashi