Re: [alsa-devel] Is there a way to figure out if the clocks of two snd_pcm_t's deviate? (snd_pcm_info_get_sync?)

On Fri, Sep 04, 2009 at 08:44:50AM +0200, Jaroslav Kysela wrote:

I cannot recall from my mind, if any card has two clock sources - maybe only old Gravis UltraSound hardware with GF1 and CS4231 chips, but it's history. Also, professional hardware can run with word clock sync (wire connection carrying sample clock) or S/PDIF clock sync. But it's matter of user configuration.

Several of the embedded CODECs can have multiple master clocks active simultaneously within just that device and even more embedded systems are able to run with multiple masters.