[AG-TECH] Mute switch for AG.

[Osland, CD (Chris)]

For some sites this will be true - it depends on how many mics
are used, how close to people, how close to loudspeakers, etc.,
as this affects how much change in the room acoustic the
echo canceller sees when a mic is muted.  If the EC was doing
a lot of work to suppress echoes, then one mic muted may be
a disaster.  If it was doing very little, then probably no
problem.  Most people will not know how hard the EC is working:
I wouldn't know how to measure it unless I could work out a way
of viewing pre-EC and post-EC signals in the Gentner.

Jennifer, I'm not pointing a finger - just trying to ensure that
only best practice is promulgated round the community!

Cheers

Chris

____________________________________________________________________
Chris Osland                                               Office tel: +44
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Digital Media and Access Grid                          Medialab tel: +44 (0)
1235 446459
BIT Department                                     Access Grid room tel: +44
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e-mail:   C.D.Osland at rl.ac.uk                                       Fax: +44
(0) 1235 445597
CLRC Rutherford Appleton Laboratory (Bldg. R18)
Chilton, DIDCOT, Oxon OX11 0QX, UK
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> -----Original Message-----
> From: Jennifer Teig von Hoffman [mailto:jtvh at bu.edu]
> Sent: 25 March 2004 14:03
> To: AG-TECH at mcs.anl.gov
> Subject: Re: [AG-TECH] Mute switch for AG.
> 
> 
> True, the only person who can't hear an echo problem is the 
> one causing 
> it. Still, I'd be surprised if we'd been having this problem 
> all these 
> years without anybody mentioning it -- we've been using these 
> mics since 
> spring of 2000.
> 
> - Jennifer
> 
> Osland, CD (Chris) wrote:
> 
> > Quick reply re using mute buttons on mics, and an additional reason
> > for NOT using them ...
> > 
> > Yes, the buttons work.  Yes, the retrain time is quickish.  Yes,
> > even 30 seconds is a long time in a tense meeting.
> > 
> > However, remember the ancient truth: the person causing an echo
> > problem is the ONLY person who CAN'T hear the problem.  No apologies
> > about use of capitals in the above.
> > 
> > Hence, the person using the mute buttons is the one person 
> who doesn't
> > hear any disturbance (large or small) that their action causes.
> > 
> > Cheers
> > 
> > Chris
> > 
> > ____________________________________________________________________
> > Chris Osland                                               
> Office tel: +44
> > (0) 1235 446565
> > Digital Media and Access Grid                          
> Medialab tel: +44 (0)
> > 1235 446459
> > BIT Department                                     Access 
> Grid room tel: +44
> > (0) 1235 445666
> > e-mail:   C.D.Osland at rl.ac.uk                               
>         Fax: +44
> > (0) 1235 445597
> > CLRC Rutherford Appleton Laboratory (Bldg. R18)
> > Chilton, DIDCOT, Oxon OX11 0QX, UK
> > [The contents of this email are confidential and are for 
> the use of the
> > intended recipient only.
> > If you are not the intended recipient do not take any 
> action on it or show
> > it to anyone else,
> > but return this email to the sender and delete your copy of it.]
> > 
> > 
> > 
> > 
> > 
> > 
> >>-----Original Message-----
> >>From: cunningham at psc.edu [mailto:cunningham at psc.edu]
> >>Sent: 24 March 2004 17:32
> >>To: AG-TECH at mcs.anl.gov
> >>Subject: [AG-TECH] Mute switch for AG.
> >>
> >>
> >>
> >>My boss wants us to add mute switches to our AG so the users 
> >>can mute and unmute
> >>as desired w/o operator intervention.
> >>
> >>An ideal system would either mute outside of the machines, 
> >>(between Gentner and
> >>aud-cap), or toggle the mute within rat through an interface 
> >>to aud-cap.
> >>I have no idea how the latter would work.
> >>
> >>There would be 3-4 momentary switches for our tables that 
> >>would toggle the 
> >>state from muted to unmuted or back with a touch of the 
> >>switch.  The system
> >>would also have an indicator that shows whether we're muted 
> >>or live at any
> >>given point.
> >>
> >>Have any of you put together such a system or know if/where 
> >>one is available?
> >>
> >>Thanks,
> >>Steve
> >>
> >>
>