[PD] name of latency measurement algorithm
reduzent at gmail.com
Thu Dec 13 13:51:35 CET 2018
On Thu, 2018-12-13 at 13:21 +0100, Peter P. wrote:
> * Roman Haefeli <reduzent at gmail.com> [2018-12-13 11:58]:
> > Hey all
> > I once read about a simple and robust way to perform latency
> > measurements with an audio signal.
> > Explained in a few words, the test signal consists of a sweeping
> > sine
> > tone. The return signal ring-modulates the source signal and the
> > resulting signal consists of two frequencies, the sum ( f_src+f_ret
> > )
> > and difference ( f_src - f_ret), while the lower frequency is
> > proportional to the latency and can be detected quite easily
> > with with
> > e.g. [sigmund~].
> > I have troubles finding the name of this algorithm and don't
> > remember
> > the original source. I would like to read more about it and
> > correctly
> > attribute the original author / inventor.
> See jack_delay on https://kokkinizita.linuxaudio.org/linuxaudio/
That's a different algorithm and probably much more precise. The one
I'm looking for is simpler (and I'd probably know how to implement it
Anyway, thanks for the input. It's certainly an interesting approach,
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