From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Courtier-Dutton Subject: Re: Re: [PATCH] remove emu10k1 pops/clicks at the beginning and end of playback (fwd) Date: Sat, 05 Mar 2005 14:37:40 +0000 Message-ID: <4229C434.6090005@superbug.co.uk> References: <1109960235.6442.9.camel@mindpipe> <4229925C.6020009@superbug.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-2; format=flowed Content-Transfer-Encoding: 7bit In-Reply-To: Sender: alsa-devel-admin@lists.sourceforge.net Errors-To: alsa-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Jindrich Makovicka Cc: alsa-devel@lists.sourceforge.net List-Id: alsa-devel@alsa-project.org Jindrich Makovicka wrote: > James Courtier-Dutton wrote: > >> If it is of interest, the PCI transfers happen in blocks of 64 BYTES. >> So, if the playback pointer is in the middle of a block of 64 BYTES, >> and you wish to send new samples to the card, without missing any of >> them, you should start sending them at the next 64 bytes boundry. > > > AFAIK, emupcm (at least the part I try to fix) operates in DMA busmaster > mode, so "sending" samples is out of its jurisdiction. It just sets up > looping over the DMA buffer and lets the card do the rest. > > FX8010 & ASIO is a different story, but I really don't know much in this > matter. > > Regards, Same thing really. I meant DMA mode. The card requests the transfers in 64 byte blocks. ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click