Subject: Re: [linux-audio-dev] open-source like hardware
From: Rene Rebe (rene.rebe_AT_gmx.net)
Date: Sun Jan 13 2002 - 19:49:33 EET
Hi.
From: "Pieter" <pieter.palmers_AT_student.kuleuven.ac.be>
Subject: RE: [linux-audio-dev] open-source like hardware
Date: Sun, 13 Jan 2002 17:21:04 +0100
> I also have no experience with firewire, but it is indeed a nice idea.
> It actually comes down to the same thing as making a PCI board with breakout
> box. You would put a DSP on the board and interface to the breakout box
> using
> SPI or I²S or something like that.
For the bandwith of SPI I would have to take one of my Mororola books
out of the shelf (but I have to learn for exams, currently :-(), but
I²C would be far too slow. (Or did you really mean I²S (which I have
not heared, yet ...).
But with firewire we only need one box. An Firewire Interface
(stand-alone, or intergraded into an DSP [is there one?]) and then
connecting the AD and DA onverters somwhere on its busses. When we use
some of the high-quality Crystal ones, there is not much
anlog-component work to do to get really perfect sound - they do this
alone ;-) (ok - they cost a bit ;-)
> The only drawback could be latency. I don't know what the latency issues are
> with firewire cards. I guess it depends on the controller used. Anyone any
> experience?
There are one or two commercial firefire audio-boxes out - maybe
searching for a test report in the net would help.
Here is one of them:
http://www.motu.com/english/motuaudio/828/body.html
> Now on to finding how to interface with a DSP...
>
> Pieter
>
> PS: firewire is a nice option for laptop users too, my father bought a Dell
> lattidude C810, and
> it has firewire support. I think the future will bring more high-performance
> laptops with firewire
> support. (I guess I'm sold...)
> PPS: Blowing up my mainboard isn't a hobby, another advantage for firewire.
;-)
k33p h4ck1n6
René
-- René Rebe (Registered Linux user: #248718 <http://counter.li.org>)eMail: rene.rebe_AT_gmx.net rene_AT_rocklinux.org
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