From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Brown Subject: Re: [PATCH 2/2 v2] ASoC: arizona: Improve ultrasonic frequency response Date: Tue, 4 Feb 2014 00:17:27 +0000 Message-ID: <20140204001727.GO22609@sirena.org.uk> References: <1391184978-14516-1-git-send-email-ckeepax@opensource.wolfsonmicro.com> <1391184978-14516-2-git-send-email-ckeepax@opensource.wolfsonmicro.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============6339557305200375280==" Return-path: Received: from mezzanine.sirena.org.uk (mezzanine.sirena.org.uk [106.187.55.193]) by alsa0.perex.cz (Postfix) with ESMTP id D766F26158B for ; Tue, 4 Feb 2014 01:17:46 +0100 (CET) In-Reply-To: <1391184978-14516-2-git-send-email-ckeepax@opensource.wolfsonmicro.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: Charles Keepax Cc: alsa-devel@alsa-project.org, patches@opensource.wolfsonmicro.com, lee.jones@linaro.org, sameo@linux.intel.com, lgirdwood@gmail.com List-Id: alsa-devel@alsa-project.org --===============6339557305200375280== Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="2+gS0LBHjVo9w9tQ" Content-Disposition: inline --2+gS0LBHjVo9w9tQ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Fri, Jan 31, 2014 at 04:16:18PM +0000, Charles Keepax wrote: > Evaluation of the device has given some settings to improve the > ultrasonic frequency response. However, this may cause sub-optimal > performance in system designs with high output gains on the headphone > path (0dB or -2dB), and as the frequencies are inaudible anyway some > users may not desire higher frequency response at those frequencies. > So allow the user the option to select it if it is appopriate for > their system design. Reading what you're saying here I can't help but think that this sounds like it may be use case dependent as well and therefore something that ought to be runtime controllable depending on if ultrasonics and/or line level outputs are in use (0dB isn't high gain, it's no gain!) for example. --2+gS0LBHjVo9w9tQ Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQIcBAEBAgAGBQJS8DGUAAoJELSic+t+oim9KscP/1S6F/X0Mw2HsuOzDHIwOmGU mk/f8MWtrwyhmpAzg4VyHqmIZM9u/5I8Sm4zHsj1if9iKisV980H6KnetzQSncZk 5dpIEfU4/RAaZh4av23QrqN8CWUPfla1s5MjSXKvcc05Y/eOzmMoF19I2ZuLs+UG 8C1FrWtZKMDStcH6Yn03RzH86cxTPxKXamRKLUdpULed2ZnJ4LcNGVdttBWPZDsd uvHE4jjRz3lV8VH8q040dpTN/d8lggAsTPcndLE4iPuHf1rQVmJKcznGvP3+TReD CXSPQKQ3o5i7tIMcJnmIvyKE9yq3cExgOddIqbkjh2oA4z8zv93+Bi8euRhZqfCj UhQvPnMaxMWtKcHDp9468WkSZyQZ8T+b6yZti/tehxYALZr1rmPYk+qHic7JQR7v CQ1uS1LmAKFO6NPiCo+ENHsyFupGs0l4ULvxVSb8jW79YcbFC1o4hvD77wVEObdA fdD0oVcgLolMgrvO/Cks07auSRsu4aC7AnC8ZVSvRw3qJDCbqUMWoljs8N8dETm7 ygcxDqUMnCShGyuCplKH3ct3b6gkwbFUsr/2TzyblMx7YKDKaVfAdVetzokW7dgU lmBPLdjfShxPImD3poOc78Vs0Qka0rNezJDtB/lXKmsUYHbYXUhNZY1su3vfgbna s6sjQPiiBsjvPc1m1ijY =gv4V -----END PGP SIGNATURE----- --2+gS0LBHjVo9w9tQ-- --===============6339557305200375280== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline --===============6339557305200375280==--