Re: [LAD] [LAU] FOSS Ethernet Soundcard

On Thu, 26 Nov 2009 03:44:51 +0100
Jens M Andreasen <jens.andreasen@email-addr-hidden> wrote:

>
> On Thu, 2009-11-26 at 01:24 +0000, Folderol wrote:
> > It's late, but I can't sleep, so...
>
> > set sample rate -> 44.1, 48, 96, ? (default 48)
>
> > If anyone can see any obvious holes in this or simplifications please
> > say so.
>
>
> Crystals controlling inexpensive DAC'c and ADC's will be drifting. There
> should be a solder-iron solution for that, but only as long as they live
> in the same box.

ADCs with built-in very fast conversions (1-2uS), externally triggered
by precision tunable oscillators, these (across different boards)
frequency locked by very slow, averaging FLLs. Phase may be skewed but
frequency should be held.

> Upsampling to 192k at the receiving end to better hide the
> skipped/inserted samples might be an idea.

Or possibly interpolation between the two either side of the missing
one.

-- 
Will J Godfrey
http://www.musically.me.uk
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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