From mboxrd@z Thu Jan 1 00:00:00 1970 From: Clemens Ladisch Subject: Re: A problem with USB audio devices and the UHCI scheduler Date: Wed, 04 Jul 2012 15:43:04 +0200 Message-ID: <4FF44868.70506@ladisch.de> References: <4FF33018.2050701@ladisch.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from out3-smtp.messagingengine.com (out3-smtp.messagingengine.com [66.111.4.27]) by alsa0.perex.cz (Postfix) with ESMTP id 55F40104409 for ; Wed, 4 Jul 2012 15:43:08 +0200 (CEST) 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: Monty Montgomery Cc: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org Monty Montgomery wrote: > The device does use altsets for different sample formats and > input/output channels, just not altsets for each sample rate (as > supported/encouraged by the Audio Class... Supported, but not encouraged: | A typical use of alternate settings is to provide a way to change | the bandwidth requirements an active AudioStreaming interface | imposes on the USB. > Is it really the case that other Audio Class devices never make use > of the "multiple sample rates in an altset" feature? They do, but not when bandwidth matters. Regards, Clemens