measuring audio latency?

[Dan Kegel]

On Tue, Mar 9, 2010 at 2:00 AM, Maarten Lankhorst
<m.b.lankhorst at gmail.com> wrote:
> I don't know about any automated way, but one could conceivably just
> write a program that outputs a sound at a certain frequency and tries
> to find that frequency back in the input.

No need for a frequency - a single pulse would do it, as outlined at
http://manual.audacityteam.org/index.php?title=Latency_Test
https://ccrma.stanford.edu/~matt/latencytest/
http://www.music.mcgill.ca/~ich/research/icmc01/latency-icmc2001.pdf

> But it wouldn't be needed to
> determine how much latency wine itself adds. You can deduce that by
> simple math, since there is a upper bound on it. :)

That's fine in theory, but as Reagan said, "trust, but verify".
There are a lot of probably's, if's, and but's in what you wrote,
and many layers, so it's quite reasonable to want a simple
automated check to actually measure the final latency.
- Dan