From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lee Revell Subject: Re: [Alsa-user] USB card @48kHz only: at what layer to resample? Date: Sun, 24 Sep 2006 13:07:08 -0400 Message-ID: <1159117628.2899.17.camel@mindpipe> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@lists.sourceforge.net Errors-To: alsa-devel-bounces@lists.sourceforge.net To: Bill Unruh Cc: alsa-user , alsa-devel List-Id: alsa-devel@alsa-project.org On Sun, 2006-09-24 at 08:12 -0700, Bill Unruh wrote: > This is audio card insanity. All CDs are at 44100 but for some reason > many card manufacturers designed their cards to run at 48000. This is > a real problem since this requires rate conversion. Rate conversion is > in general a very very noisy operation. In particular simple linear > interpolation, which is quick, is also really really terrible for > sound quality. > DVDs use 48000. But I seem to recall vendors shipping 48Khz-only cards before playing DVD on a computer was common... Lee ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV