From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932142AbWAJBuF (ORCPT ); Mon, 9 Jan 2006 20:50:05 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932138AbWAJBuE (ORCPT ); Mon, 9 Jan 2006 20:50:04 -0500 Received: from mail3.uklinux.net ([80.84.72.33]:41603 "EHLO mail3.uklinux.net") by vger.kernel.org with ESMTP id S1750931AbWAJBuB (ORCPT ); Mon, 9 Jan 2006 20:50:01 -0500 Date: Tue, 10 Jan 2006 02:00:17 +0000 From: John Rigg To: Hannu Savolainen Cc: John Rigg , David Lang , =?iso-8859-1?Q?Ren=E9?= Rebe , Jaroslav Kysela , Takashi Iwai , linux-sound@vger.kernel.org, ALSA development , LKML Subject: Re: [Alsa-devel] Re: [OT] ALSA userspace API complexity Message-ID: <20060110020017.GB5375@localhost.localdomain> References: <20050726150837.GT3160@stusta.de> <200601091405.23939.rene@exactcode.de> <200601091812.55943.rene@exactcode.de> <20060109232043.GA5013@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.6+20040907i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jan 10, 2006 at 02:48:35AM +0200, Hannu Savolainen wrote: > On Mon, 9 Jan 2006, John Rigg wrote: > > > Yes, but the CPU has plenty of other work to do. The sound cards that > > would be worst affected by this are the big RME cards (non-interleaved) and > > multiple ice1712 cards (non-interleaved blocks of interleaved data), > ice1712 uses normal interleaving. There are no "non-interleaved blocks". With two ice1712 cards I had to patch jackd for MMAP_COMPLEX support to make them work together. My understanding was that the individual cards use interleaved data, but when several are combined the resulting blocks of data are not interleaved together. I realise the usual way of dealing with this is to use the alsa route plugin with ttable to interleave them, but I couldn't get it to work with these cards. John