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Tue, 1 Sep 2026 10:40:02 +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 Ap79E4Krlmo0CwAAD6G6ig (envelope-from ); Tue, 01 Sep 2026 10:40:02 +0000 Date: Tue, 01 Sep 2026 12:39:57 +0200 Message-ID: <8733vtdzlu.wl-tiwai@suse.de> From: Takashi Iwai To: Peter Drabik Cc: linux-sound@vger.kernel.org, tiwai@suse.de, perex@perex.cz Subject: Re: [PATCH] ALSA: usb-audio: Add mixer map quirk for Audient iD24 In-Reply-To: <20260831195855.1836617-1-drabik.p@gmail.com> References: <20260831195855.1836617-1-drabik.p@gmail.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/30.2 Mule/6.0 Precedence: bulk X-Mailing-List: linux-sound@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-Spam-Score: -2.01 X-Rspamd-Queue-Id: 83F0F22774 X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Spam-Level: X-Rspamd-Action: no action X-Spamd-Result: default: False [-2.01 / 50.00]; BAYES_HAM(-3.00)[99.99%]; SUSPICIOUS_RECIPS(1.50)[]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; ARC_NA(0.00)[]; FREEMAIL_TO(0.00)[gmail.com]; TO_DN_SOME(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; RCVD_TLS_ALL(0.00)[]; DKIM_TRACE(0.00)[suse.de:+]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from]; DNSWL_BLOCKED(0.00)[2a07:de40:b281:106:10:150:64:167:received]; RCVD_VIA_SMTP_AUTH(0.00)[]; TAGGED_RCPT(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:dkim,suse.de:mid,imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns] X-Spam-Flag: NO On Mon, 31 Aug 2026 21:58:55 +0200, Peter Drabik wrote: > > The Audient iD24 (2708:000d) exposes feature unit 12 as a 4-channel > "Speaker Playback Volume" control (cmask 0xf, -127..0 dB). The device > does not actually apply this volume to all of its output channels: the > left main output ignores it and stays at 0 dB, while the right main > output honors it. > > When userspace (PulseAudio / PipeWire in a stereo profile) adopts this > control as the master playback volume, any setting below maximum > produces a stereo imbalance on the main outputs. > > This was verified against the device's internal meters: with the > control set to 107/127 (-20 dB) on all four channels and a digitally > identical L/R sine played back, both DAW return meters read the same > level while the right main output metered exactly 20 dB below the > left. Restoring the control to 127 (0 dB) restored the balance. > > Rename the control to "Monitor Mix Playback" so that it is not picked > up as the stream's master volume control, in line with similar quirks > for other devices. The control remains accessible for manual use. > > Signed-off-by: Peter Drabik Applied now. Thanks. Takashi