From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Hofman Subject: Re: Juli@ ICE1724 and 24 bit audio Date: Mon, 09 Feb 2009 21:26:46 +0100 Message-ID: <49909186.4050902@insite.cz> References: <366C228A7F9A4AAF9EE7190DC4C0EE68@PDSDesktop> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mailserver.bobrnet.net (bobrnet.cust.inethome.cz [88.146.180.6]) by alsa0.perex.cz (Postfix) with ESMTP id 7EA0C103840 for ; Mon, 9 Feb 2009 21:26:51 +0100 (CET) In-Reply-To: <366C228A7F9A4AAF9EE7190DC4C0EE68@PDSDesktop> 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: Demian Martin Cc: alsa-devel@alsa-project.org, pavel.hofman@insite.cz List-Id: alsa-devel@alsa-project.org Demian Martin napsal(a): > I have the driver working fine for sample rates from 44.1K to 196K however > it seems to be truncating the data to 16 bits. I wasn't sure until I started > testing with the HRx 176.4K 24 bit files that have an embedded HDCD flag in > the LSB. The files work OK on Windoze systems (with a lot of low level > settings tweaked) and they play fine but the flag isn't detected by a system > that can detect them. Further looking at the data stream with a scope it > seems the last 8 bits aren't changing. Is there anything I can do to control > the driver to confirm this problem or change the playback settings to make > it work? > > How do you play the files? Do you use the hw or plug:hw device? IIRC, the standard-setup dmix resampler is 16-bit only. I did tests with SPDIF OUT/IN and found it bit-perfect, for 24bit too. Regular ICE1724 cards do not output 176.4kHz SPDIF, only 88.2kHz. But Juli is not affected by that bug. Regards, Pavel.