[linux-audio-dev] Setting the Beat of a Clock

[fons adriaensen]

On Sun, Sep 25, 2005 at 11:14:47AM -0300, Lisandro Damián Nicanor Pérez Meyer wrote:

> This is a good question to CapnLinux: what kind of precision do you
> need?
> Fons: why do you think the sample rate is not accurate enough?

An audio card that is 0.1 percent off would be quite good for most non
professional uses. This error is about 1/60 of a semitone in musical
terms, and a 3 minute song would be longer or shorter by no more than
a fraction of a second. But most consumer audio cards will show larger
errors.

A clock with that same precision would be off by almost one and a half
minute per day. To set a clock you'd want a relative error of say 1e-6.
That's a factor 1000 better.

-- 
FA