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Date:      Thu, 9 Oct 1997 06:03:39 +0100 (MET)
From:      Luigi Rizzo <luigi@labinfo.iet.unipi.it>
To:        dcarmich@Mcs.Net (Douglas Carmichael)
Cc:        freebsd-hackers@FreeBSD.ORG
Subject:   Re: FreeBSD for digital recording w/PCI multitrack in/out cards?
Message-ID:  <199710090503.GAA12182@labinfo.iet.unipi.it>
In-Reply-To: <199710082310.SAA21519@Jupiter.Mcs.Net> from "Douglas Carmichael" at Oct 8, 97 06:09:52 pm

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> With Jordan's comment about FreeBSD in the recording studio, it could be
> done with PCI-based multitrack audio I/O cards (e.g. Event Electronics
> Layla - FAQ at http://www.event1.com/layla-faq.html), and some changes to
> the sound driver (e.g. creating /dev/[audio|dsp][0-7]).
> 
> Could FreeBSD handle the guaranteed 8-channel in/out?

The main problem is that pci audio devices are unsupported and we can
only work on them if we have the specs. So far I haven't seen the data
sheets of any PCI card available on the net. manufacturers usually do
not respond (or those who do already have the data sheets on the net).

I cannot check the URL you pointed above in this moment, but if they do
not have programming specs then we are out of luck. Otherwise I am
willing to work on a driver if someone provides specs and a card.

Note that my audio driver (see
http://www.iet.unipi.it/luigi/FreeBSD.html) can handle multiple
ISA boards (and I quite often have 2-3 active in my test machine)
although you will likely run out of DMA channels with >3 boards
(if you are smart enough and do not want full duplex, then you
might get 4-5 ISA audio cards up and running; but then you are
going to have bandwidth problems on the ISA bus.)

> What multitrack recording software exists for FreeBSD?

it's a user-space thing, once we have solved the device problem as
depicted above, any software available on the net for unix machines
will do. i know of none at the moment but I think I have seen something
on the net. check the oss page or some linux doc on audio.

	Cheers
	Luigi



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