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<DIV dir=ltr align=left><SPAN class=375092409-26082008><FONT face=Arial
color=#0000ff size=2>Hi Andrew,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=375092409-26082008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=375092409-26082008><FONT face=Arial
color=#0000ff size=2>I'm guessing you already know that some sound card drivers
allow all the audio output channels to be mixed into the input channel, which is
either the Microphone on a desktop node or Line In on a room node. This is
usually a Windows Volume Control recording setting, something like 'Stereo
Mix' or 'Wave Out Mix'.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=375092409-26082008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=375092409-26082008><FONT face=Arial
color=#0000ff size=2>But I don't know how you'd prevent echo, as the incoming
audio would end up in the same audio channel as local applications, i.e. the
'Wave' channel.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=375092409-26082008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=375092409-26082008><FONT face=Arial
color=#0000ff size=2>I agree that 2 sound cards is the best option, getting apps
to choose their preferred sound device. You'd then need to physically bridge the
Line Out of the app's sounds card into the input of the AG sound card, i.e.
using a 3.5mm jack Tee. I'm not sure how this would work out with a desktop
node, as you're using the Mic input on the AG sound card, i.e. different
levels.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=375092409-26082008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=375092409-26082008><FONT face=Arial
color=#0000ff size=2>Hope I've got this right!?</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=375092409-26082008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=375092409-26082008><FONT face=Arial
color=#0000ff size=2>Ben.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=375092409-26082008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=375092409-26082008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV><BR>
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<FONT face=Tahoma size=2><B>From:</B> owner-ag-tech@mcs.anl.gov
[mailto:owner-ag-tech@mcs.anl.gov] <B>On Behalf Of </B>Andrew
Leahy<BR><B>Sent:</B> 25 August 2008 05:30<BR><B>To:</B>
ag-tech<BR><B>Subject:</B> [AG-TECH] how do I get desktop audio 'into'
AG/RAT?<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV dir=ltr>Hi - this is a tough one because of all the echo/feedback
problems.<BR><BR>How do sites capture audio from applications on a AG desktop
and get it into the AG environment?<BR><BR>For example, if I want to share
desktop multimedia I can use VPCScreenProducer to inject the video into
VIC.<BR>But what do I do about audio? the normal audio-out is echo cancelled by
the ClearOne or similar device so isn't transmitted into RAT.<BR><BR>One idea,
that I haven't tried, is to use a second sound device and feed it into the
ClearOne or room to be picked up by the line/mic-in on the primary card (where
RAT is recording)? But then I have the hassle of figuring how to tell particular
apps to use device 2 rather than device 1 for audio.<BR><BR>My application is
with Linux (FC) desktops, but the same problem would apply to Windows & OS
X.<BR><BR>Any advice would be welcome.<BR><BR>Cheers, Andrew<BR><BR>School of
Computing & Mathematics<BR>University of Western
Sydney<BR><BR></DIV></BODY></HTML>