Le duodi 2 fructidor, an CCXXV, Paul B Mahol a écrit :
> So it is. So unless you tell what exactly you mean I can not help you.

My bad.

> testsrc(2) are useless for lipsync testing, when one needs to know
> exact time something is played in wrong time.

Yes, testsrc alone is not enough. But you did not read carefully enough:
I mentioned testsrc2+sine. The sine source can optionally generate a
periodic beep, just like your proposal. I grant you, the duration and
period of the beep cannot be configured, but that would be easy to add.
And sine is bit-exact and faster.

Regards,

-- 
  Nicolas George

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