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Re: [Discuss-gnuradio] Broadcast Receiver Audio Synchronization ( Delay

From: Fons Adriaensen
Subject: Re: [Discuss-gnuradio] Broadcast Receiver Audio Synchronization ( Delay locked loop for the two-clock problem)
Date: Sun, 6 Nov 2016 17:35:52 +0000
User-agent: Mutt/1.5.21 (2010-09-15)

On Sun, Nov 06, 2016 at 05:08:37PM +0000, Benny Alexandar wrote:

> Instead of relying the fourth clock on CPU,  we can use a counter
> from audio hardware that will be more stable than CPU timer.
> I would like to explore this option of using a TimeStampCounter
> (TSC) from  audio hardware if it exists. If you know of any please
> let me know.

You won't find such a thing on most (99.9% of) audio hardware.
Nor would it help. As explained before, the stability of the
timer used to get timestamps on both the input and output
streams of the resampler doesn't matter much, it basically
almost disappears from the equations, and what remains is
absolutely insignificant. None of the things I've written
would work otherwise.  



A world of exhaustive, reliable metadata would be an utopia.
It's also a pipe-dream, founded on self-delusion, nerd hubris
and hysterically inflated market opportunities. (Cory Doctorow)

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