[LAD] AoIP question

[tom at trellis.ch]

On Sun, October 5, 2014 22:51, Len Ovens wrote:
> On Sun, 5 Oct 2014, tom at trellis.ch wrote:
>
>
>> Hi, i'm following the thread of the ongoing topics around transmitting
>> audio over IP infrastructure. As a scenario, at point a) an analog signal
>> is injected that will be played back (analog) at point b) with the
>> lowest possible (and constant) latency. How do you intend to handle
>> diverging clocks of the audio interfaces (ADC/DAC) at both (a/b) ends?
>>
>
> AES67 (and other formats) use PTP (IEEE 1588-2008) to keep the system
> clocks aligned at a usec level. The media clock is then derived from that.
>  The media clock on both systems should therefore be syncronis.
>

ok, you can make the systems "in-sync" with PTP. but are there audio
interfaces that can use the clock from the host? i.e. the host drives the
audio interfaces clock.