From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jussi Laako Subject: Re: [PATCH 0/3] ALSA: snd-usb: Some small fixes to make Playback Design products work Date: Sat, 23 Mar 2013 22:01:46 +0200 Message-ID: <514E0A2A.1000201@sonarnerd.net> References: <1363522047-7515-1-git-send-email-zonque@gmail.com> <5146DB40.2060000@gmail.com> <51471B51.4000006@gmail.com> <514B79DA.6030203@sonarnerd.net> <514C1215.9010708@gmail.com> <7.0.0.16.2.20130322082602.0605cbc0@akdesigninc.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: Received: from mail.sonarnerd.net (rankki.sonarnerd.net [83.145.240.118]) by alsa0.perex.cz (Postfix) with ESMTP id B7BA52652B9 for ; Sat, 23 Mar 2013 21:01:46 +0100 (CET) In-Reply-To: <7.0.0.16.2.20130322082602.0605cbc0@akdesigninc.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: Andreas Koch Cc: alsa-devel@alsa-project.org, Takashi Iwai , clemens@ladisch.de, Daniel Mack , demian@auraliti.com, ray@auraliti.com List-Id: alsa-devel@alsa-project.org On 03/22/2013 06:05 PM, Andreas Koch wrote: > The 8-bit raw format is for 2.8MHz DSD and the 16-bit format is for > 5.6MHz DSD. In both cases the driver sets the sample rate to 352.8kHz on > the DAC, I see, this is different from how I've been dealing with it. Since I always use uint8 format, but instead vary the rate to 352.8/705.6/etc... Just because it's much more straightforward form the application's perspective -> output rate is always bit rate divided by eight (=packet rate). And switch between uint8 / uint32 sample format equals to switch between DSD <-> PCM. - Jussi