[Gllug] multiple mic-in [VERY OT]

[Dylan Brewis]

On Saturday 11 May 2002 23:52, Richard Cottrill wrote:
> Possibly a really silly question:
> Is it possible to use more than one sound card in a machine? I've never
> tried; in fact I've never gotten sound to work under Linux at all (but I
> haven't really had many opportunities to try either).

Should think so, wouldn't u end up with /dev/snd0 /dev/snd1 ...?
I had 2 running under Windoze once (ONCE, mind u!)

> 
> It may also be relevant that some cards (older only?) have/had separate
> line-in and microphone ports. From my spectacularly limited understanding of
> sound equipment, the difference is a pre-amp or something. Whatever the
> difference is I'm pretty sure I've gotten them mixed up and lived to tell
> the tale.

Well, microphones and record players output at milivolt levels, and line 
level is a couple of orders of magnitude above that. There are deeply 
technical signal differences as well, but they're probably not too relevant 
for sound cards (given the presence of fans and transformers) - anyone who 
was concerned about that stuff would have an external preprocessor.

> 
> Richard
> 
> > -----Original Message-----
> > From: gllug-admin at linux.co.uk [mailto:gllug-admin at linux.co.uk]On Behalf
> > Of Dylan Brewis
> > Sent: Sunday, May 12, 2002 2:28 AM
> > To: gllug at linux.co.uk
> > Subject: Re: [Gllug] multiple mic-in [VERY OT]
> >
> >
> > What exactly u trying to do?
> > do u need to discriminate the inputs?
> > can u mix them before the computer interface?
> >
> > On Saturday 11 May 2002 23:25, Daniel Andersson wrote:
> > > hi
> > >
> > > this is probably quite ot.
> > >
> > > i'm looking at building some home automation stuff and
> > currently i'm looking
> > > into doing some voice recognition.
> > > i can buy some hardware for £300 + £120 per mic, but that price doesn't
> > > really attract me.
> > > so i'm looking at going DIY.
> > >
> > > what i feel that i need is a sound card with 5 or more mic-in's
> > or a special
> > > mic-in card that works under linux.
> > >
> > > does anyone know of one or know where to search for one? tried
> > google, but
> > > no luck so far.
> > >
> > > thanks in advance
> > >
> > > / d
> > >
> > >
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> 
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