From mboxrd@z Thu Jan 1 00:00:00 1970 From: Takashi Iwai Subject: Re: emu10k1 latency / capture period Date: Fri, 18 Jun 2004 11:33:58 +0200 Sender: alsa-devel-admin@lists.sourceforge.net Message-ID: References: <40D1E4E7.8000704@joe-job.com> <200406172326.i5HNQkQV017899@dhin.linuxaudiosystems.com> Mime-Version: 1.0 (generated by SEMI 1.14.5 - "Awara-Onsen") Content-Type: text/plain; charset=US-ASCII Return-path: In-Reply-To: <200406172326.i5HNQkQV017899@dhin.linuxaudiosystems.com> Errors-To: alsa-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Paul Davis Cc: Lee Revell , Alsa-devel@lists.sourceforge.net, pzad@pobox.sk List-Id: alsa-devel@alsa-project.org At Thu, 17 Jun 2004 19:26:46 -0400, Paul Davis wrote: > > >To reiterate the situation: currently the ASIO drivers for this card > >provide an order of magnitude > >better latency than the ALSA driver. I am constantly hearing claims > >that ALSA is superior to ASIO, > >but no one can tell me why the ALSA drivers for this *very* common > >device provide 5-10x worse latency > >than the ASIO drivers. > > > >As I see it, this is a glaring deficiency. > > as a disinterested observer, i would just note that by my > understanding, Creative have not released all the necessary > programming information on the emu10k1. i suspect that whatever is > necessary to get the period size down to the levels the ASIO driver(s) > are using is in the information that they will not release without an > NDA. It might be. But my guess is that ASIO uses the playback interrupt for capture, too. Takashi ------------------------------------------------------- This SF.Net email is sponsored by The 2004 JavaOne(SM) Conference Learn from the experts at JavaOne(SM), Sun's Worldwide Java Developer Conference, June 28 - July 1 at the Moscone Center in San Francisco, CA REGISTER AND SAVE! http://java.sun.com/javaone/sf Priority Code NWMGYKND