From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Brown Subject: Re: ASoC:Question rate constraint between the dais Date: Mon, 19 Mar 2012 16:32:39 +0000 Message-ID: <20120319163239.GD5132@opensource.wolfsonmicro.com> References: <64362.10.252.27.21.1331805184.squirrel@linux.intel.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============4504680282369028194==" Return-path: Received: from opensource.wolfsonmicro.com (opensource.wolfsonmicro.com [80.75.67.52]) by alsa0.perex.cz (Postfix) with ESMTP id 831C010419F for ; Mon, 19 Mar 2012 17:32:42 +0100 (CET) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: James Courtier-Dutton Cc: Ramesh Babu , alsa-devel@alsa-project.org, Liam Girdwood List-Id: alsa-devel@alsa-project.org --===============4504680282369028194== Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="jCrbxBqMcLqd4mOl" Content-Disposition: inline --jCrbxBqMcLqd4mOl Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Mon, Mar 19, 2012 at 04:12:42PM +0000, James Courtier-Dutton wrote: > A majority of the sound cards out there do 48KHz well, but not so well > on other rates, so defaulting to 48KHz is probably the best choice. This really isn't so true in the embedded space, there's a few systems that only do 48kHz to the AP but generally if there's a fixed sample rate it'll usually be 44.1kHz and otherwise the rates will be flexible. > One of the most difficult things is getting 44.1KHz MP3s etc. > resampled to 48KHz, but most MP3 playing apps support good resamplers > so they can still talk to pulseaudio at 48KHz. Again, not so true for embedded and burning power on resampling tends not to make people happy. --jCrbxBqMcLqd4mOl Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAEBAgAGBQJPZ1+FAAoJEBus8iNuMP3dT3IQAIR0oA0P0tEhiO5WY+w/9Gcf vfI1IL/YOvpDas7x4Pg6M4dJbTInCCeFsKJEkFzQoOnAdhHuEnF5geXhU/+GZv+l HATzwdvZ4fA4g0K0VeY3PuQz/C6167nfVMNdxEDWS/UzD7OH42Kz4/a/Awn9CtIi wfULSJeHIpYxAE3Mx9FBs7KUtuJ6hbGkw9u9tYD0BwXE1ewZ2YzzpojjxSKTf40g tI0Lu9MQIhlB8m9fVOWjp2p2Myh6/gunsTRsl9I9yv9LDgYYsjddOV5wvrZvLNus Ueb+GFvoPdffe4GTuTIBpKhBPHyNYzUQe+oMUGBp4mkSCKIdXSRctqc7k4MnaTWz MKEz9FX3HsLfzEWTARCkwmpbQ4KlXNsG94Tl8ew1IWOzp9scYU4mJWqhZfXW2X8V Oo3+pY8XcLUunV4xmDKb5T7NJc5J9WJcT//Qpkt08wlSoSuINcfjXtbsqSbpSKIj 4T//vaJrjiIz0J8wi9IsjxCAQ5v50o4/BiyQKJ7fwzkq7RKU57OAOr1RuirEcUAI TwJ/HCwt9X8MOJ8KEzR83gfIhyqbnJDZHyS/14OjRBQWOnRdv3FAUTPR3A7PlQut hExkycFLJvK6Qhi1SoNcKMUCCPNoAnKehSr+OYNA4ZWedFee9T5fUfUylmlpIe1v j6vHp2Htb9jjTfjH0Cgk =oXHd -----END PGP SIGNATURE----- --jCrbxBqMcLqd4mOl-- --===============4504680282369028194== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline --===============4504680282369028194==--