From mboxrd@z Thu Jan 1 00:00:00 1970 From: Manuel Jander Subject: Re: Using hardware timers for the ALSA sequencer Date: Wed, 16 Mar 2005 20:21:13 -0400 Message-ID: <1111018873.3239.1.camel@localhost> References: <1110845236.15588.23.camel@mindpipe> Reply-To: mjander@users.sourceforge.net Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit In-Reply-To: <1110845236.15588.23.camel@mindpipe> 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: alsa-devel List-Id: alsa-devel@alsa-project.org Hi, At least the aureal vortex has a high resolution hardware timer too. So if this leads to some code to support hardware timers, i would suggest something useable for other hardware too. Best Regards Manuel J. On Mon, 2005-03-14 at 19:07 -0500, Lee Revell wrote: > Hey, > > The emu10k1 timer thread reminded me of an idea I had. > > Currently the ALSA sequencer always uses the system timer by default. > If your sound cards timer is supported by ALSA (emu10k1 and ymfpci), > this provides 50-100x better resolution. But in order to get the ALSA > sequencer to use it you have to use the seq_default_timer_* options > (which BTW I had never heard of on the list, I stumbled across them > reading the source). > > How hard would it be to get the sequencer to prefer the hardware timer > by default and fall back to the system timer otherwise? Probably would > not be noticeable for a MIDI keyboard, but for applications like sending > MIDI clock/MTC, the system timer resolution can be inadequate. > > Would this be a good idea? > > Lee > > > > > > ------------------------------------------------------- > 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 > _______________________________________________ > Alsa-devel mailing list > Alsa-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/alsa-devel -- Manuel Jander Electronic Engineer ------------------------------------------------------- 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