[LAU] Something odd

Will Godfrey willgodfrey at musically.me.uk
Sun Aug 16 15:04:54 UTC 2015

On Sun, 16 Aug 2015 08:06:00 +0000
Fons Adriaensen <fons at linuxaudio.org> wrote:

> On Sat, Aug 15, 2015 at 10:27:33PM +0100, Will Godfrey wrote:
> > As a matter of curiosity I wonder if we can work out what the actual difference
> > is. Would the Xrun occur when there was a one frame difference, one period, or
> > 1 buffer? It's running at 256 frames per period and 2 periods per buffer. The
> > xruns occur every 11 minutes (and a few seconds).
> If you assume that an xrun occurs when the difference in samples is
> one period, then the difference in sample frequency is P / T, with
> P the period and T the time in seconds between xruns.
> With the values you give:
> dF = 256 / (11 * 60) =~ 0.39 Hz.
> You can measure this easily using jack_delay (or jack_iodelay).
> The change in measured latency, in samples, per second is the
> difference in sample rate.
> Ciao,


Considering this is a mid-range unit V 'standard' motherboard sound, that's
actually rather impressive.

Will J Godfrey
Say you have a poem and I have a tune.
Exchange them and we can both have a poem, a tune, and a song.

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