" Even X-tal oscillators can be tuned over a small range by a voltage controlled capacitor. "
one should remember that tunability is the opposite of stability/low jitter. If we are talking about synchronization, master clock should be as stable as possible (i.e. xtal, and no caps), and slave clocks should be implemented as good PLLs (good == low jitter). In other words, tunable xtal is a bad xtal by definition. On Mon, 2 Jan 2006 15:53:47 +0100 fons adriaensen <[EMAIL PROTECTED]> wrote: > On Mon, Jan 02, 2006 at 03:14:14PM +0100, Asbjørn Sæbø wrote: > > > What I really would like is a sound card with adjustable sampling > > frequency. That is, small scale tunable on an almost continous scale. > > Practiaclly, I think that one possible way to do it would be to use a > > temperature sensitive clock crystal in combination with some form of > > controllable heating element (e.g. a resistor). > > Not necessary to use that sort of plumbing. Even X-tal oscillators > can be tuned over a small range by a voltage controlled capacitor. > > To measure clock differences in software (using the interrupt > timing, with jitter), you can use a DLL such as used in JACK. > One of its internal variables will be proportional to the ratio > sample clock / reference clock. > > -- > FA > > > > ------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. Do you grep through log files > for problems? Stop! Download the new AJAX search engine that makes > searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! > http://ads.osdn.com/?ad_idv37&alloc_id865&op=click > _______________________________________________ > Alsa-user mailing list > Alsa-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/alsa-user > ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_idv37&alloc_id865&op=click _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
