Re: PCIe audio gear [was: Too many xruns]

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On 6 September 2012 at 21:52, "Len Ovens" <len@xxxxxxxxxxxxx> wrote:

> 
> On Thu, September 6, 2012 8:57 pm, Ralf Mardorf wrote:
> > On Thu, 2012-09-06 at 20:35 -0700, Len Ovens wrote:
> >> I just had to look... and sure enough they do exist:
> >> http://ca.startech.com/Cards-Adapters/Slot-Extension/PCI-Express-to-PCI-Adapter-Card~PEX1PCI1

Also, http://www.newegg.com/Product/Product.aspx?Item=N82E16815158165
which has some customer reviews.

> > Are such adapters ok for audio IO cards? Latency? Audio jitter? MIDI
> > jitter? Etc.?
> 
> Could be better. The bridge will be the same as what the MB supplies for
> it's PCI slots. The extra power plug means cleaner power and enough drive
> for the analog audio circuitry. Latency will be the same. Audio jitter is
> more effected by whats in the card itself. The second link I gave
> (http://www.jrigg.co.uk/elec/interface.html) actually goes into some
> detail about that. MIDI is slow at 3khz for words and half that for a key
> down event. I wish I could use my boca board for that (from BBS days) with
> 16 uarts. 16 outputs one for each synth. But I think it is actually an isa
> board. If I ever use it again it will be with netboot dx66 or something
> and just enough OS to get it to network. Anyway, jitter is more in the
> software and drivers and how they handle (or don't) the midi signal.

--
Kevin


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