Subject: Re: [linux-audio-dev] Gibson magic protocol
From: Martijn Sipkema (msipkema_AT_sipkema-digital.com)
Date: Tue Apr 15 2003 - 20:40:23 EEST
> > > Has anybody investigated the Gibson MaGIC protocol for use on Linux?
It
> > looks like a perfect match: lots of audio channels and control data over
> > CAT5. Just buy a separate network card, port their protocol to Linux,
and
> > then you could use their 16-in 16-out box, or get input directly
> > from one of
> > their new guitars with the RJ45 port on it. The The only scary
> > bit is that
> > the license is free "for the next10 years" only.
> >
> > I may be wrong but I don't think this protocol will work with a
> > normal NIC. I'm not sure what (if any?) the advantages of this
> > protocol are over IEEE1394.
>
> I've looked at the protocol a very little bit. (I work in the 1394 area.)
I
> have not seen a detailed spec though, so I only have impressions. Take the
> following with a grain of salt.
>
> 1) I do not think the packets that are sent in this protocol will
> necessarily coexist very well with standard Ethernet, so the observation
of
> doing it with a second NIC is probably correct from what I can tell.
That's
> really no different than replacing a 1394 adapter with a second NIC, which
> is probably less expensive if it works.
It will _not_ coexist with standard Ethernet and I doubt a NIC can be
used because the timing is very critical. You'd probably have to buy a
dedicated MaGIC interface.
> 2) CAT5 cables would be superior to 1394 as they are locked into the
> connectors and wouldn't fall out of your guitar. They are longer and more
> flexible. On the downside, CAT5 connectors quickly wear out so what works
> well today may not work well after a few evenings of heavy gigging.
FireWire will be able to use CAT5 also IIRC.
--ms
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